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Communications
Class Information
Number:
375/20
Name:
Pulse or digital communications
>
Description:
Sub-classes under this class:
Class Number
Class Name
Patents
375/130
Spread spectrum
1,442
375/211
Repeaters
254
375/216
Apparatus convertible to analog
213
375/218
Earth or water medium
15
375/219
Transceivers
1,230
375/224
Testing
796
375/229
Equalizers
823
375/237
Pulse number modulation
32
375/238
Pulse width modulation
446
375/239
Pulse position, frequency, or spacing modulation
297
375/240
Bandwidth reduction or expansion
911
375/242
Pulse code modulation
442
375/256
Pulse transmission via radiated baseband
85
375/257
Cable systems and components
856
375/259
Systems using alternating or pulsating current
747
375/286
Multilevel
294
375/295
Transmitters
1,213
375/316
Receivers
1,627
375/353
Pulse amplitude modulation
122
375/354
Synchronizers
1,518
375/377
Miscellaneous
582
Patents under this class:
Patent Number
Title Of Patent
Date Issued
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