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Class Information
Number: 708
Name: Electrical computers: arithmetic processing and calculating >
Description: GENERAL STATEMENT OF THE CLASS SUBJECT MATTER










Class Number Class Name No. of Patents
708/800

Electrical analog calculating computer

30
708/801

Particular function performed

260
708/805

Averaging

21
708/809

Coordinate conversion or vector resolver

30
708/810

Electromechanical

3
708/813

Correlation or convolution

111
708/815

Acoustic

124
708/818

Having tapped delay line

46
708/817

Magnetic or electromagnetic

8
708/814

Of multidimensional data

10
708/816

Optical

255
708/822

Differentiation

21
708/844

Division

20
708/802

Evaluation of equation

23
708/804

Differential (e.g., differential analyzer)

10
708/803

Simultaneous

7
708/808

Evaluation of powers

10
708/807

Evaluation of root (e.g., square root)

17
708/811

Evaluation of trigonometric function

26
708/812

Single triangle

3
708/819

Filtering

290
708/845

Function generation

60
708/849

Cathode-ray tube

13
708/854

Electromechanical

5
708/853

Hyperbolic

4
708/851

Logarithmic/exponential

34
708/846

Piece-wise linear synthesis

17
708/848

Diode breakpoint

0
708/847

Interpolation/extrapolation

18
708/852

Triangular, sawtooth, or ramp

17
708/850

Two or more variables

0
708/823

Integrator

28
708/833

Amplifier with additional feedback loop

3
708/834

Additional r/c feedback loop

8
708/827

Drift correction

8
708/831

Electro-optical

23
708/830

Electromechanical

2
708/829

Having a voltage to frequency converter

8
708/828

Having simultaneous calculation of another function

8
708/832

Magnetic or electromagnetic

2
708/824

Plural integration

12
708/825

Plural mode (e.g., plural scale)

2
708/826

Reset

9
708/835

Multiplication

126
708/840

Electromagnetic

3
708/841

Hall effect

2
708/842

Electromechanical (e.g., servo-multiplier)

1
708/838

Having charging or discharging of energy storage device

24
708/839

Photomultiplier

29
708/837

Quarter-square

4
708/836

Time division

8
708/843

With alternative division

4
708/820

Transform

42
708/821

Fourier

74
708/806

Variance or standard deviation determination

9
708/100

Electrical digital calculating computer

89
708/192

Bubble-domain

6
708/105

Combined with diverse art device

100
708/110

Business device (e.g., billing, memorandum)

52
708/106

Checkbook

26
708/109

Communication device (e.g., telephone, radio, television)

72
708/111

Horological device

87
708/112

Calendar

74
708/108

Tape recorder

13
708/107

Writing instrument (e.g., pen)

26
708/191

Electro-optical

146
708/131

Having specialized input

124
708/138

Flexible input

17
708/135

For security

53
708/137

Fraction input

24
708/132

Having supplemental environment related input

43
708/134

Business

47
708/133

Cooking

27
708/139

Including specific computing system interconnection

53
708/142

Including specific keyboard-type information entry

185
708/146

Key sequencing (i.e., sequence defines function)

97
708/143

Nonmechanical key actuation

13
708/145

Plural function key

113
708/144

User definable key

40
708/141

Including specific nonkeyboard-type information entry

111
708/136

Input verification

32
708/140

Modular or overlay nonkeyboard-type information entry

69
708/160

Having specialized output

71
708/172

Audio

48
708/165

Blanking

2
708/166

Zero suppression

7
708/161

Having supplemental environment related output

10
708/163

Business

22
708/162

Teaching

20
708/174

Multiple simultaneous outputs

49
708/164

Output verification

17
708/173

Printer

50
708/167

Prompting

18
708/168

Selective output

22
708/169

Sequential output

14
708/171

Symbol accompanying output

24
708/170

Using particular format

21
708/190

Integrated circuit

81
708/200

Particular function performed

415
708/201

Absolute value or magnitude

79
708/490

Arithmetical operation

372
708/670

Addition/subtraction

210
708/700

Binary

91
708/701

Bipolar junction transistor only or combined with field-effect transistor

16
708/702

Field-effect transistor (fet)

87
708/704

For precharging (e.g., manchester, etc.)

27
708/703

Gate functional level

65
708/706

Parallel

87
708/709

Adding more than two numbers

77
708/710

Carry look-ahead

143
708/712

Slice block having block look-ahead

36
708/711

Slice block having block ripple

52
708/713

Tree structured logic blocks

21
708/707

Carry-ripple

83
708/708

Carry-save adders

78
708/714

Conditional sums

89
708/705

Serial

19
708/678

By electronic tube

0
708/683

Coded decimal

16
708/685

Parallel

16
708/684

Serial

1
708/671

Comparison

94
708/677

Cryogenic

3
708/680

Decimal

10
708/682

Parallel

4
708/681

Serial

0
708/672

Incrementation/decrementation

83
708/679

Magnetic

2
708/676

Microwave

0
708/673

Radix correction

28
708/674

Serial

3
708/675

Signal amplitude

7
708/604

All four basic functions

9
708/540

Cathode-ray tube

2
708/550

Compensation for finite word length

53
708/552

Overflow or underflow

106
708/553

Prediction

22
708/551

Round off or truncation

130
708/541

Contact-making device

1
708/650

Division

195
708/653

Binary

83
708/654

Multiplication by reciprocal

79
708/655

Repeated subtraction

79
708/656

Multiples of divisor

52
708/652

Coded decimal

14
708/651

Decimal

14
708/530

Error detection or correction

116
708/531

Parity check

55
708/534

Plural parallel devices

20
708/532

Residue code

14
708/533

Sequential repetition

14
708/606

Evaluation of powers

81
708/605

Evaluation of root

123
708/495

Floating point

212
708/505

Addition or subtraction

213
708/496

Compensation for finite word length

46
708/498

Overflow or underflow

57
708/497

Round off or truncation

136
708/499

Sticky bit

37
708/511

Complex number format

18
708/504

Division

81
708/500

Evaluation of root

61
708/506

Feedback

6
708/512

Logarithmic format

16
708/514

Matrix array

33
708/510

Microprocessor

43
708/501

Multiplication followed by addition

161
708/503

Multiplication

99
708/507

Parallel

34
708/508

Pipeline

52
708/502

Reciprocal

46
708/509

Systolic

10
708/513

Variable length or precision

62
708/492

Galois field

339
708/494

Incremental mode

7
708/517

Logarithmic format

62
708/520

Matrix array

204
708/493

Multi-valued

109
708/524

Multiple parallel operations

122
708/523

Multiplication followed by addition (i.e., x*y+z)

217
708/607

Multiplication of matrices

126
708/620

Multiplication

272
708/625

Binary

325
708/627

Repeated addition

80
708/628

Multiple digit

144
708/630

Array adders

73
708/629

Carry-save adders (i.e., csas)

78
708/632

Feedback

29
708/631

Pipeline

26
708/626

Sum of cross products

87
708/624

Coded decimal

17
708/622

Complex number format

64
708/623

Decimal

14
708/519

Negative radix

4
708/521

Pipeline

55
708/542

Radix point control

22
708/491

Residue number

317
708/525

Status condition/flag generation or use

141
708/603

Sum of products generation

188
708/522

Systolic

25
708/518

Variable length

120
708/445

Averaging

112
708/203

Compression/decompression

301
708/420

Convolution

105
708/421

Cyclic/circular

25
708/442

Coordinate conversion

93
708/422

Correlation

251
708/426

Autocorrelation

65
708/424

Multidimensional data

31
708/423

Single bit data

15
708/425

Using tapped delay line

38
708/212

Detecting particular sequence of bits

106
708/210

Determining number of like-valued bits in word

69
708/211

Determining number of like-valued leading or trailing bits

99
708/443

Differentiation

27
708/440

Evaluation of trigonometric function

54
708/441

Vector resolver

54
708/300

Filtering

798
708/322

Adaptive

568
708/323

Equalizer

532
708/315

By convolution

86
708/310

Coherent

24
708/313

Decimation/interpolation

631
708/307

Delta/differential coded

38
708/306

Finite arithmetic effect

81
708/311

Frequency detection

59
708/312

Tone detection

65
708/309

Frequency measurement

51
708/316

Having multiplexing

187
708/305

Initialization

29
708/318

Lattice

33
708/314

Matched filter type

92
708/303

Microprocessor

61
708/308

Multidimensional data

96
708/304

Nonlinear (e.g., median, etc.)

64
708/321

Nontime domain

60
708/320

Recursive

211
708/301

Tapped delay line

78
708/319

Transversal

481
708/317

Wave

30
708/204

Format conversion

222
708/205

Normalization

178
708/270

Function generation

199
708/275

Circular

24
708/273

Counter as source (i.e., input)

22
708/271

Direct digital frequency synthesizer

117
708/274

Linear

75
708/277

Logarithmic/exponential

107
708/272

Memory used to store waveshape

89
708/276

Trigonometric

227
708/444

Integration

46
708/290

Interpolation/extrapolation

327
708/207

Maximum/minimum determination

136
708/202

Median

33
708/230

Multifunctional

175
708/232

Array of elements (e.g., and/or array, etc.)

166
708/231

Microprocessor

34
708/236

More than two operands

22
708/234

Parallel bit input of operand

22
708/233

Pipeline

59
708/235

Uses look-up table

64
708/250

Random number generation

630
708/252

Linear feedback shift register

184
708/251

Oscillator controlled

99
708/253

Plural parallel outputs bits

63
708/256

Plural parallel outputs

59
708/254

Seed value controls

75
708/255

Truly random number

121
708/208

Scaling

68
708/209

Shifting

305
708/446

Solving equation

158
708/400

Transform

283
708/402

Discrete cosine transform (i.e., dct)

269
708/403

Fourier

152
708/409

Butterfly circuit

69
708/405

Discrete fourier transform (i.e., dft)

158
708/404

Fast fourier transform (i.e., fft)

334
708/406

Pipeline

49
708/408

Radix greater than two

38
708/407

Systolic

13
708/401

Multidimensional

147
708/410

Walsh

57
708/206

Unit conversion

45
708/104

Plural complete computers

21
708/130

Programmable calculator

111
708/101

Pulse repetition rate

43
708/102

Digital differential analyzer

27
708/103

Multiplication or division

116
708/1

Electrical hybrid calculating computer

41
708/3

Particular function performed

181
708/5

Correlation, convolution, or transformation

113
708/4

Evaluation of trigonometric function

33
708/8

Function generation

79
708/9

Piece-wise linear synthesis

27
708/6

Integration or differentiation

26
708/7

Multiplication or division

86
708/2

Plural complete computers

10
 
 
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