| Class 708 | ELECTRICAL COMPUTERS: ARITHMETIC PROCESSING AND CALCULATING |
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![[List of Pre Grant Publications for class 708 subclass 1]](../as.gif) | ![[List of Patents for class 708 subclass 1]](../ps.gif) | 1 | ELECTRICAL HYBRID CALCULATING COMPUTER |
| | 100 | ELECTRICAL DIGITAL CALCULATING COMPUTER |
| | 101 |  Pulse repetition rate |
| | 104 | Plural complete computers |
| | 105 | Combined with diverse art device |
| | 106 |  Checkbook |
| | 107 | Writing instrument (e.g., pen) |
| | 108 | Tape recorder |
| | 109 | Communication device (e.g., telephone, radio, television) |
| | 110 | Business device (e.g., billing, memorandum) |
| | 111 | Horological device |
| | 130 | Programmable calculator |
| | 131 | Having specialized input |
| | 132 | Having supplemental environment related input |
| | 135 | For security |
| | 136 | Input verification |
| | 137 | Fraction input |
| | 138 | Flexible input |
| | 139 | Including specific computing system interconnection |
| | 140 | Modular or overlay nonkeyboard-type information entry |
| | 141 | Including specific nonkeyboard-type information entry |
| | 142 | Including specific keyboard-type information entry |
| | 160 | Having specialized output |
| | 161 | Having supplemental environment related output |
| | 164 | Output verification |
| | 165 | Blanking |
| | 167 | Prompting |
| | 168 | Selective output |
| | 169 | Sequential output |
| | 170 | Using particular format |
| | 171 | Symbol accompanying output |
| | 172 | Audio |
| | 173 | Printer |
| | 174 | Multiple simultaneous outputs |
| | 190 | Integrated circuit |
| | 191 | Electro-optical |
| | 192 | Bubble-domain |
| | 200 | Particular function performed |
| | 201 | Absolute value or magnitude |
| | 202 | Median |
| | 203 | Compression/decompression |
| | 204 | Format conversion |
| | 206 | Unit conversion |
| | 207 | Maximum/minimum determination |
| | 208 | Scaling |
| | 209 | Shifting |
| | 210 | Determining number of like-valued bits in word |
| | 211 | Determining number of like-valued leading or trailing bits |
| | 212 | Detecting particular sequence of bits |
| | 230 | Multifunctional |
| | 231 |  Microprocessor |
| | 232 | Array of elements (e.g., AND/OR array, etc.) |
| | 233 | Pipeline |
| | 234 | Parallel bit input of operand |
| | 235 | Uses look-up table |
| | 236 | More than two operands |
| | 250 | Random number generation |
| | 251 | Oscillator controlled |
| | 252 | Linear feedback shift register |
| | 253 | Plural parallel outputs bits |
| | 254 | Seed value controls |
| | 255 | Truly random number |
| | 256 | Plural parallel outputs |
| | 270 | Function generation |
| | 271 | Direct digital frequency synthesizer |
| | 272 | Memory used to store waveshape |
| | 273 | Counter as source (i.e., input) |
| | 274 | Linear |
| | 275 | Circular |
| | 276 | Trigonometric |
| | 277 | Logarithmic/exponential |
| | 290 | Interpolation/extrapolation |
| | 300 | Filtering |
| | 301 | Tapped delay line |
| | 303 | Microprocessor |
| | 304 | Nonlinear (e.g., median, etc.) |
| | 305 | Initialization |
| | 306 | Finite arithmetic effect |
| | 307 | Delta/differential coded |
| | 308 | Multidimensional data |
| | 309 | Frequency measurement |
| | 310 | Coherent |
| | 311 | Frequency detection |
| | 313 | Decimation/interpolation |
| | 314 | Matched filter type |
| | 315 | By convolution |
| | 316 | Having multiplexing |
| | 317 | Wave |
| | 318 | Lattice |
| | 319 | Transversal |
| | 320 | Recursive |
| | 321 | Nontime domain |
| | 322 | Adaptive |
| | 400 | Transform |
| | 401 | Multidimensional |
| | 402 | Discrete Cosine Transform (i.e., DCT) |
| | 403 | Fourier |
| | 404 |  Fast Fourier Transform (i.e., FFT) |
| | 405 | Discrete Fourier Transform (i.e., DFT) |
| | 406 | Pipeline |
| | 407 | Systolic |
| | 408 | Radix greater than two |
| | 409 | Butterfly circuit |
| | 410 | Walsh |
| | 420 | Convolution |
| | 422 | Correlation |
| | 440 | Evaluation of trigonometric function |
| | 442 | Coordinate conversion |
| | 443 | Differentiation |
| | 444 | Integration |
| | 445 | Averaging |
| | 446 | Solving equation |
| | 490 | Arithmetical operation |
| | 491 | Residue number |
| | 492 | Galois field |
| | 493 | Multi-valued |
| | 494 | Incremental mode |
| | 495 | Floating point |
| | 496 | Compensation for finite word length |
| | 500 | Evaluation of root |
| | 501 | Multiplication followed by addition |
| | 502 | Reciprocal |
| | 503 | Multiplication |
| | 504 | Division |
| | 505 | Addition or subtraction |
| | 506 | Feedback |
| | 507 | Parallel |
| | 508 | Pipeline |
| | 509 | Systolic |
| | 510 | Microprocessor |
| | 511 | Complex number format |
| | 512 | Logarithmic format |
| | 513 | Variable length or precision |
| | 514 | Matrix array |
| | 517 | Logarithmic format |
| | 518 | Variable length |
| | 519 | Negative radix |
| | 520 | Matrix array |
| | 521 | Pipeline |
| | 522 | Systolic |
| | 523 | Multiplication followed by addition (i.e., x*y+z) |
| | 524 | Multiple parallel operations |
| | 525 | Status condition/flag generation or use |
| | 530 | Error detection or correction |
| | 540 | Cathode-ray tube |
| | 541 | Contact-making device |
| | 542 | Radix point control |
| | 550 | Compensation for finite word length |
| | 603 | Sum of products generation |
| | 604 | All four basic functions |
| | 605 | Evaluation of root |
| | 606 | Evaluation of powers |
| | 607 | Multiplication of matrices |
| | 620 | Multiplication |
| | 650 | Division |
| | 670 | Addition/subtraction |
| | 671 | Comparison |
| | 672 | Incrementation/decrementation |
| | 673 | Radix correction |
| | 675 | Signal amplitude |
| | 676 | Microwave |
| | 677 | Cryogenic |
| | 678 | By electronic tube |
| | 679 | Magnetic |
| | 680 | Decimal |
| | 683 | Coded decimal |
| | 700 | Binary |
| | 800 | ELECTRICAL ANALOG CALCULATING COMPUTER |
| | 801 | Particular function performed |
| | 802 | Evaluation of equation |
| | 805 | Averaging |
| | 806 | Variance or standard deviation determination |
| | 807 | Evaluation of root (e.g., square root) |
| | 808 | Evaluation of powers |
| | 809 | Coordinate conversion or vector resolver |
| | 811 | Evaluation of trigonometric function |
| | 813 | Correlation or convolution |
| | 814 | Of multidimensional data |
| | 815 | Acoustic |
| | 816 | Optical |
| | 817 | Magnetic or electromagnetic |
| | 818 | Having tapped delay line |
| | 819 | Filtering |
| | 820 | Transform |
| | 822 | Differentiation |
| | 823 | Integrator |
| | 824 | Plural integration |
| | 825 | Plural mode (e.g., plural scale) |
| | 826 | Reset |
| | 827 | Drift correction |
| | 828 | Having simultaneous calculation of another function |
| | 829 | Having a voltage to frequency converter |
| | 830 | Electromechanical |
| | 831 | Electro-optical |
| | 832 | Magnetic or electromagnetic |
| | 833 | Amplifier with additional feedback loop |
| | 835 | Multiplication |
| | 836 | Time division |
| | 837 | Quarter-square |
| | 838 | Having charging or discharging of energy storage device |
| | 839 | Photomultiplier |
| | 840 | Electromagnetic |
| | 842 | Electromechanical (e.g., servo-multiplier) |
| | 843 | With alternative division |
| | 844 | Division |
| | 845 | Function generation |
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