| Classifications | Code | Applications | Subscribe |
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| ELECTRICAL HYBRID CALCULATING COMPUTER | 708/001000 | 0 | |
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| Plural complete computers | 708/002000 | 0 | |
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| Particular function performed | 708/003000 | 0 | |
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| Evaluation of trigonometric function | 708/004000 | 0 | |
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| Correlation, convolution, or transformation | 708/005000 | 0 | |
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| Integration or differentiation | 708/006000 | 0 | |
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| Multiplication or division | 708/007000 | 0 | |
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| Function generation | 708/008000 | 0 | |
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| Piece-wise linear synthesis | 708/009000 | 0 | |
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| ELECTRICAL DIGITAL CALCULATING COMPUTER | 708/100000 | 0 | |
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| Pulse repetition rate | 708/101000 | 0 | |
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| Digital differential analyzer | 708/102000 | 0 | |
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| Multiplication or division | 708/103000 | 0 | |
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| Plural complete computers | 708/104000 | 0 | |
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| Combined with diverse art device | 708/105000 | 0 | |
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| Checkbook | 708/106000 | 0 | |
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| Writing instrument (e.g., pen) | 708/107000 | 0 | |
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| Tape recorder | 708/108000 | 0 | |
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| Communication device (e.g., telephone, radio, television) | 708/109000 | 0 | |
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| Business device (e.g., billing, memorandum) | 708/110000 | 0 | |
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| Horological device | 708/111000 | 0 | |
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| Calendar | 708/112000 | 0 | |
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| Programmable calculator | 708/130000 | 0 | |
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| Having specialized input | 708/131000 | 0 | |
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| Having supplemental environment related input | 708/132000 | 0 | |
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| Cooking | 708/133000 | 0 | |
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| Business | 708/134000 | 0 | |
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| For security | 708/135000 | 0 | |
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| Input verification | 708/136000 | 0 | |
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| Fraction input | 708/137000 | 0 | |
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| Flexible input | 708/138000 | 0 | |
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| Including specific computing system interconnection | 708/139000 | 0 | |
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| Modular or overlay nonkeyboard-type information entry | 708/140000 | 0 | |
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| Including specific nonkeyboard-type information entry | 708/141000 | 0 | |
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| Including specific keyboard-type information entry | 708/142000 | 0 | |
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| Nonmechanical key actuation | 708/143000 | 0 | |
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| User definable key | 708/144000 | 0 | |
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| Plural function key | 708/145000 | 0 | |
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| Key sequencing (i.e., sequence defines function) | 708/146000 | 0 | |
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| Having specialized output | 708/160000 | 0 | |
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| Having supplemental environment related output | 708/161000 | 0 | |
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| Teaching | 708/162000 | 0 | |
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| Business | 708/163000 | 0 | |
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| Output verification | 708/164000 | 0 | |
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| Blanking | 708/165000 | 0 | |
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| Zero suppression | 708/166000 | 0 | |
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| Prompting | 708/167000 | 0 | |
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| Selective output | 708/168000 | 0 | |
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| Sequential output | 708/169000 | 0 | |
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| Using particular format | 708/170000 | 0 | |
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| Symbol accompanying output | 708/171000 | 0 | |
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| Audio | 708/172000 | 0 | |
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| Printer | 708/173000 | 0 | |
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| Multiple simultaneous outputs | 708/174000 | 0 | |
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| Integrated circuit | 708/190000 | 0 | |
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| Electro-optical | 708/191000 | 0 | |
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| Bubble-domain | 708/192000 | 0 | |
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| Particular function performed | 708/200000 | 0 | |
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| Absolute value or magnitude | 708/201000 | 0 | |
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| Median | 708/202000 | 0 | |
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| Compression/decompression | 708/203000 | 0 | |
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| Format conversion | 708/204000 | 1 | |
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| Normalization | 708/205000 | 0 | |
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| Unit conversion | 708/206000 | 0 | |
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| Maximum/minimum determination | 708/207000 | 0 | |
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| Scaling | 708/208000 | 0 | |
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| Shifting | 708/209000 | 0 | |
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| Determining number of like-valued bits in word | 708/210000 | 0 | |
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| Determining number of like-valued leading or trailing bits | 708/211000 | 0 | |
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| Detecting particular sequence of bits | 708/212000 | 0 | |
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| Multifunctional | 708/230000 | 0 | |
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| Microprocessor | 708/231000 | 0 | |
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| Array of elements (e.g., AND/OR array, etc.) | 708/232000 | 0 | |
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| Pipeline | 708/233000 | 0 | |
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| Parallel bit input of operand | 708/234000 | 0 | |
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| Uses look-up table | 708/235000 | 0 | |
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| More than two operands | 708/236000 | 0 | |
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| Random number generation | 708/250000 | 0 | |
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| Oscillator controlled | 708/251000 | 0 | |
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| Linear feedback shift register | 708/252000 | 0 | |
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| Plural parallel outputs bits | 708/253000 | 0 | |
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| Seed value controls | 708/254000 | 0 | |
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| Truly random number | 708/255000 | 0 | |
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| Plural parallel outputs | 708/256000 | 0 | |
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| Function generation | 708/270000 | 0 | |
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| Direct digital frequency synthesizer | 708/271000 | 0 | |
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| Memory used to store waveshape | 708/272000 | 0 | |
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| Counter as source (i.e., input) | 708/273000 | 0 | |
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| Linear | 708/274000 | 0 | |
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| Circular | 708/275000 | 0 | |
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| Trigonometric | 708/276000 | 0 | |
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| Logarithmic/exponential | 708/277000 | 0 | |
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| Interpolation/extrapolation | 708/290000 | 0 | |
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| Filtering | 708/300000 | 0 | |
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| Tapped delay line | 708/301000 | 0 | |
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| Microprocessor | 708/303000 | 0 | |
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| Nonlinear (e.g., median, etc.) | 708/304000 | 0 | |
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| Initialization | 708/305000 | 0 | |
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| Finite arithmetic effect | 708/306000 | 0 | |
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| Delta/differential coded | 708/307000 | 0 | |
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| Multidimensional data | 708/308000 | 0 | |
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| Frequency measurement | 708/309000 | 0 | |
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| Coherent | 708/310000 | 0 | |
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| Frequency detection | 708/311000 | 0 | |
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| Tone detection | 708/312000 | 0 | |
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| Decimation/interpolation | 708/313000 | 0 | |
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| Matched filter type | 708/314000 | 0 | |
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| By convolution | 708/315000 | 0 | |
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| Having multiplexing | 708/316000 | 0 | |
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| Wave | 708/317000 | 0 | |
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| Lattice | 708/318000 | 0 | |
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| Transversal | 708/319000 | 0 | |
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| Recursive | 708/320000 | 0 | |
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| Nontime domain | 708/321000 | 0 | |
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| Adaptive | 708/322000 | 0 | |
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| Equalizer | 708/323000 | 0 | |
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| Transform | 708/400000 | 0 | |
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| Multidimensional | 708/401000 | 0 | |
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| Discrete Cosine Transform (i.e., DCT) | 708/402000 | 0 | |
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| Fourier | 708/403000 | 0 | |
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| Fast Fourier Transform (i.e., FFT) | 708/404000 | 1 | |
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| Discrete Fourier Transform (i.e., DFT) | 708/405000 | 0 | |
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| Pipeline | 708/406000 | 0 | |
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| Systolic | 708/407000 | 0 | |
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| Radix greater than two | 708/408000 | 0 | |
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| Butterfly circuit | 708/409000 | 0 | |
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| Walsh | 708/410000 | 0 | |
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| Convolution | 708/420000 | 0 | |
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| Cyclic/circular | 708/421000 | 0 | |
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| Correlation | 708/422000 | 0 | |
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| Single bit data | 708/423000 | 0 | |
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| Multidimensional data | 708/424000 | 0 | |
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| Using tapped delay line | 708/425000 | 0 | |
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| Autocorrelation | 708/426000 | 0 | |
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| Evaluation of trigonometric function | 708/440000 | 0 | |
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| Vector resolver | 708/441000 | 0 | |
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| Coordinate conversion | 708/442000 | 0 | |
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| Differentiation | 708/443000 | 0 | |
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| Integration | 708/444000 | 0 | |
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| Averaging | 708/445000 | 0 | |
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| Solving equation | 708/446000 | 0 | |
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| Arithmetical operation | 708/490000 | 0 | |
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| Residue number | 708/491000 | 0 | |
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| Galois field | 708/492000 | 0 | |
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| Multi-valued | 708/493000 | 0 | |
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| Incremental mode | 708/494000 | 0 | |
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| Floating point | 708/495000 | 0 | |
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| Compensation for finite word length | 708/496000 | 0 | |
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| Round off or truncation | 708/497000 | 0 | |
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| Overflow or underflow | 708/498000 | 0 | |
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| Sticky bit | 708/499000 | 0 | |
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| Evaluation of root | 708/500000 | 0 | |
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| Multiplication followed by addition | 708/501000 | 0 | |
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| Reciprocal | 708/502000 | 0 | |
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| Multiplication | 708/503000 | 0 | |
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| Division | 708/504000 | 0 | |
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| Addition or subtraction | 708/505000 | 0 | |
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| Feedback | 708/506000 | 0 | |
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| Parallel | 708/507000 | 0 | |
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| Pipeline | 708/508000 | 0 | |
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| Systolic | 708/509000 | 0 | |
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| Microprocessor | 708/510000 | 0 | |
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| Complex number format | 708/511000 | 0 | |
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| Logarithmic format | 708/512000 | 0 | |
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| Variable length or precision | 708/513000 | 0 | |
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| Matrix array | 708/514000 | 0 | |
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| Logarithmic format | 708/517000 | 0 | |
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| Variable length | 708/518000 | 0 | |
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| Negative radix | 708/519000 | 0 | |
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| Matrix array | 708/520000 | 0 | |
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| Pipeline | 708/521000 | 0 | |
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| Systolic | 708/522000 | 0 | |
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| Multiplication followed by addition (i.e., x*y+z) | 708/523000 | 0 | |
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| Multiple parallel operations | 708/524000 | 0 | |
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| Status condition/flag generation or use | 708/525000 | 0 | |
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| Error detection or correction | 708/530000 | 0 | |
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| Parity check | 708/531000 | 0 | |
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| Residue code | 708/532000 | 0 | |
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| Sequential repetition | 708/533000 | 0 | |
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| Plural parallel devices | 708/534000 | 0 | |
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| Cathode-ray tube | 708/540000 | 0 | |
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| Contact-making device | 708/541000 | 0 | |
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| Radix point control | 708/542000 | 0 | |
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| Compensation for finite word length | 708/550000 | 0 | |
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| Round off or truncation | 708/551000 | 0 | |
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| Overflow or underflow | 708/552000 | 0 | |
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| Prediction | 708/553000 | 0 | |
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| Sum of products generation | 708/603000 | 0 | |
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| All four basic functions | 708/604000 | 0 | |
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| Evaluation of root | 708/605000 | 0 | |
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| Evaluation of powers | 708/606000 | 0 | |
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| Multiplication of matrices | 708/607000 | 0 | |
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| Multiplication | 708/620000 | 0 | |
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| Complex number format | 708/622000 | 0 | |
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| Decimal | 708/623000 | 0 | |
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| Coded decimal | 708/624000 | 0 | |
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| Binary | 708/625000 | 0 | |
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| Sum of cross products | 708/626000 | 0 | |
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| Repeated addition | 708/627000 | 0 | |
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| Multiple digit | 708/628000 | 0 | |
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| Carry-save adders (i.e., CSAs) | 708/629000 | 0 | |
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| Array adders | 708/630000 | 0 | |
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| Pipeline | 708/631000 | 0 | |
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| Feedback | 708/632000 | 0 | |
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| Division | 708/650000 | 0 | |
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| Decimal | 708/651000 | 0 | |
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| Coded decimal | 708/652000 | 0 | |
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| Binary | 708/653000 | 0 | |
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| Multiplication by reciprocal | 708/654000 | 0 | |
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| Repeated subtraction | 708/655000 | 0 | |
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| Multiples of divisor | 708/656000 | 0 | |
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| Addition/subtraction | 708/670000 | 0 | |
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| Comparison | 708/671000 | 0 | |
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| Incrementation/decrementation | 708/672000 | 0 | |
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| Radix correction | 708/673000 | 0 | |
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| Serial | 708/674000 | 0 | |
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| Signal amplitude | 708/675000 | 0 | |
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| Microwave | 708/676000 | 0 | |
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| Cryogenic | 708/677000 | 0 | |
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| By electronic tube | 708/678000 | 0 | |
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| Magnetic | 708/679000 | 0 | |
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| Decimal | 708/680000 | 0 | |
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| Serial | 708/681000 | 0 | |
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| Parallel | 708/682000 | 0 | |
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| Coded decimal | 708/683000 | 0 | |
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| Serial | 708/684000 | 0 | |
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| Parallel | 708/685000 | 0 | |
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| Binary | 708/700000 | 0 | |
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| Bipolar junction transistor only or combined with Field-Effect Transistor | 708/701000 | 0 | |
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| Field-Effect transistor (FET) | 708/702000 | 0 | |
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| Gate functional level | 708/703000 | 0 | |
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| For precharging (e.g., Manchester, etc.) | 708/704000 | 0 | |
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| Serial | 708/705000 | 0 | |
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| Parallel | 708/706000 | 0 | |
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| Carry-ripple | 708/707000 | 0 | |
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| Carry-save adders | 708/708000 | 0 | |
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| Adding more than two numbers | 708/709000 | 0 | |
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| Carry look-ahead | 708/710000 | 0 | |
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| Slice block having block ripple | 708/711000 | 0 | |
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| Slice block having block look-ahead | 708/712000 | 0 | |
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| Tree structured logic blocks | 708/713000 | 0 | |
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| Conditional sums | 708/714000 | 0 | |
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| ELECTRICAL ANALOG CALCULATING COMPUTER | 708/800000 | 0 | |
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| Particular function performed | 708/801000 | 0 | |
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| Evaluation of equation | 708/802000 | 0 | |
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| Simultaneous | 708/803000 | 0 | |
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| Differential (e.g., differential analyzer) | 708/804000 | 0 | |
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| Averaging | 708/805000 | 0 | |
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| Variance or standard deviation determination | 708/806000 | 0 | |
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| Evaluation of root (e.g., square root) | 708/807000 | 0 | |
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| Evaluation of powers | 708/808000 | 0 | |
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| Coordinate conversion or vector resolver | 708/809000 | 0 | |
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| Electromechanical | 708/810000 | 0 | |
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| Evaluation of trigonometric function | 708/811000 | 0 | |
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| Single triangle | 708/812000 | 0 | |
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| Correlation or convolution | 708/813000 | 0 | |
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| Of multidimensional data | 708/814000 | 0 | |
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| Acoustic | 708/815000 | 0 | |
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| Optical | 708/816000 | 0 | |
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| Magnetic or electromagnetic | 708/817000 | 0 | |
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| Having tapped delay line | 708/818000 | 0 | |
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| Filtering | 708/819000 | 0 | |
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| Transform | 708/820000 | 0 | |
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| Fourier | 708/821000 | 0 | |
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| Differentiation | 708/822000 | 0 | |
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| Integrator | 708/823000 | 0 | |
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| Plural integration | 708/824000 | 0 | |
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| Plural mode (e.g., plural scale) | 708/825000 | 0 | |
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| Reset | 708/826000 | 0 | |
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| Drift correction | 708/827000 | 0 | |
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| Having simultaneous calculation of another function | 708/828000 | 0 | |
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| Having a voltage to frequency converter | 708/829000 | 0 | |
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| Electromechanical | 708/830000 | 0 | |
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| Electro-optical | 708/831000 | 0 | |
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| Magnetic or electromagnetic | 708/832000 | 0 | |
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| Amplifier with additional feedback loop | 708/833000 | 0 | |
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| Additional R/C feedback loop | 708/834000 | 0 | |
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| Multiplication | 708/835000 | 0 | |
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| Time division | 708/836000 | 0 | |
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| Quarter-square | 708/837000 | 0 | |
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| Having charging or discharging of energy storage device | 708/838000 | 0 | |
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| Photomultiplier | 708/839000 | 0 | |
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| Electromagnetic | 708/840000 | 0 | |
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| Hall effect | 708/841000 | 0 | |
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| Electromechanical (e.g., servo-multiplier) | 708/842000 | 0 | |
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| With alternative division | 708/843000 | 0 | |
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| Division | 708/844000 | 0 | |
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| Function generation | 708/845000 | 0 | |
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| Piece-wise linear synthesis | 708/846000 | 0 | |
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| Interpolation/extrapolation | 708/847000 | 0 | |
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| Diode breakpoint | 708/848000 | 0 | |
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| Cathode-ray tube | 708/849000 | 0 | |
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| Two or more variables | 708/850000 | 0 | |
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| Logarithmic/exponential | 708/851000 | 0 | |
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| Triangular, sawtooth, or ramp | 708/852000 | 0 | |
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| Hyperbolic | 708/853000 | 0 | |
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| Electromechanical | 708/854000 | 0 | |
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| FOREIGN ART COLLECTION | 708 | 0 | |
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| CLASS-RELATED FOREIGN DOCUMENTS | 708/FOR000 | 0 | |
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