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| Class 325 Modulated carrier wave communication systems |
|---|
| cpc | description |
| 325/1 | (1) Light |
| 325/2 | (2) Electromagnetic Induction (E.G., Loop) |
| 325/3 | (3) Secrecy |
| 325/4 | (4) Aural Aid |
| 325/5 | (5) Interference Or Jamming |
| 325/6 | (6) Repeater Or Relay |
| 325/7 | (6) Repeater Or Relay (7) Pulse type |
| 325/8 | (6) Repeater Or Relay (8) With Monitoring or Failure Compensation Means |
| 325/9 | (6) Repeater Or Relay (9) With Plural Signal or Carrier Wave Transmission Means |
| 325/10 | (6) Repeater Or Relay (10) With Mobile Station |
| 325/11 | (6) Repeater Or Relay (11) With 2-Way Transmission Means |
| 325/12 | (6) Repeater Or Relay (12) With Frequency or Phase Modulation |
| 325/13 | (6) Repeater Or Relay (13) With Frequency Conversion Means |
| 325/14 | (6) Repeater Or Relay (14) With Directive Antenna or Beam Deflection Means |
| 325/15 | (15) Transmitter-Receiver Station |
| 325/16 | (15) Transmitter-Receiver Station (16) Pulse type |
| 325/17 | (15) Transmitter-Receiver Station (17) With Telephone System |
| 325/18 | (15) Transmitter-Receiver Station (18) Selection of Station or Channel |
| 325/19 | (15) Transmitter-Receiver Station (19) Mobile or Portable |
| 325/20 | (15) Transmitter-Receiver Station (20) With AFC Means |
| 325/21 | (15) Transmitter-Receiver Station (21) With One or More Common Stages |
| 325/22 | (15) Transmitter-Receiver Station (21) With One or More Common Stages (22) Transmitter Oscillator Used as Local Receiver Oscillator |
| 325/23 | (15) Transmitter-Receiver Station (23) With Transmit-Receive Switching or Interaction Prevention Means |
| 325/24 | (15) Transmitter-Receiver Station (23) With Transmit-Receive Switching or Interaction Prevention Means (24) Automatic |
| 325/25 | (15) Transmitter-Receiver Station (23) With Transmit-Receive Switching or Interaction Prevention Means (24) Automatic (25) With Distributed Parameter Transmission Line |
| 325/26 | (15) Transmitter-Receiver Station (26) With Tuning Means |
| 325/27 | (27) Transmitter And Receiver At Separate Stations |
| 325/28 | (27) Transmitter And Receiver At Separate Stations (28) Pulse type |
| 325/29 | (27) Transmitter And Receiver At Separate Stations (28) Pulse type (29) With Distortion or Noise Prevention or Correction Means |
| 325/30 | (27) Transmitter And Receiver At Separate Stations (30) With Telephone System |
| 325/31 | (27) Transmitter And Receiver At Separate Stations (31) Selection of Channel or Station |
| 325/32 | (27) Transmitter And Receiver At Separate Stations (32) Remote Control of External Circuit at Receiver |
| 325/33 | (27) Transmitter And Receiver At Separate Stations (33) With Spark Gap or Arc Discharge |
| 325/34 | (27) Transmitter And Receiver At Separate Stations (34) Earth Transmission (e.g., Water) |
| 325/35 | (27) Transmitter And Receiver At Separate Stations (35) Frequency or Phase Shift Keying Systems |
| 325/36 | (27) Transmitter And Receiver At Separate Stations (36) With Monitoring or Survey Means |
| 325/37 | (27) Transmitter And Receiver At Separate Stations (37) Sterophonic or binaural |
| 325/38 | (27) Transmitter And Receiver At Separate Stations (38) Frequency or Phase Modulator |
| 325/39 | (27) Transmitter And Receiver At Separate Stations (39) Suppressed Carrier Wave |
| 325/40 | (27) Transmitter And Receiver At Separate Stations (40) Single or Asymmetric Sideband |
| 325/41 | (27) Transmitter And Receiver At Separate Stations (41) Plural Separate Transmitters or Receivers |
| 325/42 | (27) Transmitter And Receiver At Separate Stations (41) Plural Separate Transmitters or Receivers (42) With Fading Compensation Means (e.g.,Diversity) |
| 325/43 | (27) Transmitter And Receiver At Separate Stations (43) Single Message via Plural Carrier |
| 325/44 | (27) Transmitter And Receiver At Separate Stations (44) With Calling or Signalling or Control of the Receiver |
| 325/45 | (27) Transmitter And Receiver At Separate Stations (45) With Distortion, Noise or Other Interference Prevention, Reduction or Compensating Means |
| 325/46 | (27) Transmitter And Receiver At Separate Stations (46) With Measuring or Testing |
| 325/47 | (47) Transmitters |
| 325/48 | (47) Transmitters (48) Sterio or Binaural |
| 325/49 | (47) Transmitters (49) With Telephone Circuit |
| 325/50 | (47) Transmitters (50) Pulse |
| 325/51 | (47) Transmitters (51) Spark Gap or Arc Discharge |
| 325/52 | (47) Transmitters (52) Alternator |
| 325/53 | (47) Transmitters (53) Mobile or Portable |
| 325/54 | (47) Transmitters (54) Noise, Distortion or Harmonic Depression |
| 325/55 | (47) Transmitters (55) With Distributed Parameter Structure |
| 325/56 | (47) Transmitters (56) With Testing or Signal Monitoring |
| 325/57 | (47) Transmitters (57) Suppressed Carrier or Sideband or Partial Sideband |
| 325/58 | (47) Transmitters (58) Frequency or Phase Modulation |
| 325/59 | (47) Transmitters (59) Circuit Protective Means |
| 325/60 | (47) Transmitters (60) Carrier Controlled by Absence or Presence of Modulating Signal |
| 325/61 | (47) Transmitters (61) With Frequency Conversion (e.g., Frequency Multiplier, Harmonic Generator) |
| 325/62 | (47) Transmitters (62) Variable Antenna Coupling, Impedance or Dimension |
| 325/63 | (47) Transmitters (63) With Keying |
| 325/64 | (47) Transmitters (63) With Keying (64) Frequency Shift Type |
| 325/65 | (47) Transmitters (65) Plural Transmitter Channels |
| 325/66 | (47) Transmitters (66) With Tuning Means |
| 325/67 | (47) Transmitters (67) With Amplitude Modulation |
| 325/68 | (47) Transmitters (68) With Remote Control of Transmitter |
| 325/69 | (47) Transmitters (69) With Frequency or Phase Stabilization |
| 325/70 | (47) Transmitters (70) With Power or Bias Voltage Supply or Regulation (e.g., AGC) |
| 325/71 | (71) Receivers |
| 325/72 | (71) Receivers (72) Pulse |
| 325/73 | (71) Receivers (73) Stereo or Binaural |
| 325/74 | (71) Receivers (74) Plural Separate Receivers |
| 325/75 | (71) Receivers (74) Plural Separate Receivers (75) With Output Cancelling or Selective Means (e.g., Strongest Signal) |
| 325/76 | (71) Receivers (74) Plural Separate Receivers (76) With Output Combining Means |
| 325/77 | (71) Receivers (77) Signal Distribution System to Plural Receivers or Utilization Means |
| 325/78 | (71) Receivers (78) Remote Control of External Device |
| 325/79 | (71) Receivers (79) Convertible to Different Type (e.g., AM to FM) |
| 325/80 | (71) Receivers (80) Frequency or Phase Shift |
| 325/81 | (71) Receivers (81) Exalted Carrier |
| 325/82 | (71) Receivers (82) Suppressed Carrier |
| 325/83 | (71) Receivers (83) Single Sideband |
| 325/84 | (71) Receivers (84) Asymmetric Sideband (e.g., Vestigial) |
| 325/85 | (71) Receivers (85) Panoramic |
| 325/86 | (71) Receivers (86) Interrupted Carrier Wave |
| 325/87 | (71) Receivers (87) Frequency or Phase Modulation |
| 325/88 | (71) Receivers (87) Frequency or Phase Modulation (88) With Amplitude Modulation Elimination (e.g., Limiter) |
| 325/89 | (71) Receivers (87) Frequency or Phase Modulation (89) With Squelch or Other Output Limiting Means |
| 325/90 | (71) Receivers (87) Frequency or Phase Modulation (90) Superregenerative |
| 325/91 | (71) Receivers (91) Cabinet, Housing or Chassis Structure |
| 325/92 | (71) Receivers (92) With Receiver Circuit Protective Means |
| 325/93 | (71) Receivers (93) With Wave Responsive Alarm, Indicating, Calling or Altering Means |
| 325/94 | (71) Receivers (94) With Wave Collecting Means |
| 325/95 | (71) Receivers (94) With Wave Collecting Means (95) Plural |
| 325/97 | (71) Receivers (97) Responsive to External Condition or Control (e.g., Remote Control, Speed, Time) |
| 325/98 | (71) Receivers (98) Combined with Diverse Device |
| 325/99 | (71) Receivers (98) Combined with Diverse Device (99) Recorder |
| 325/100 | (71) Receivers (98) Combined with Diverse Device (100) Vehicle |
| 325/101 | (71) Receivers (101) Grain, Level or volume Control |
| 325/102 | (71) Receivers (101) Grain, Level or volume Control (102) With Indicating Means |
| 325/103 | (71) Receivers (101) Grain, Level or volume Control (103) With Muting or Limiting |
| 325/104 | (71) Receivers (101) Grain, Level or volume Control (104) Control Voltage From or Applied to Specific Stage |
| 325/105 | (71) Receivers (101) Grain, Level or volume Control (104) Control Voltage From or Applied to Specific Stage (105) With Semiconductor |
| 325/106 | (71) Receivers (106) Local Oscillator Frequency Control (e.g., AFC) |
| 325/107 | (71) Receivers (107) Tone or Sensitivity Control |
| 325/108 | (71) Receivers (108) Selectivity or Band Width control |
| 325/109 | (71) Receivers (109) Superregenerative |
| 325/110 | (71) Receivers (110) With Frequency Modifying or Conversion Means |
| 325/111 | (71) Receivers (110) With Frequency Modifying or Conversion Means (111) Plural Separate Conversions |
| 325/112 | (71) Receivers (110) With Frequency Modifying or Conversion Means (112) Unwanted Oscillation or Radiation Prevention Means |
| 325/113 | (71) Receivers (110) With Frequency Modifying or Conversion Means (113) With Particular Conversion Means (e.g., Homodyne) |
| 325/114 | (71) Receivers (110) With Frequency Modifying or Conversion Means (113) With Particular Conversion Means (e.g., Homodyne) (114) Distributed Electrical Parameter Structure |
| 325/115 | (71) Receivers (110) With Frequency Modifying or Conversion Means (115) With Transistor |
| 325/116 | (71) Receivers (110) With Frequency Modifying or Conversion Means (116) With Diode |
| 325/117 | (71) Receivers (117) With Frequency Selection Means (e.g., Signal Seeking) |
| 325/120 | (71) Receivers (120) With Noise or Other Interference Reduction or Elimination |
| 325/121 | (71) Receivers (120) With Noise or Other Interference Reduction or Elimination (121) With Squelch or Muting Means |
| 325/122 | (71) Receivers (122) With Particular Circuit Means |
| 325/123 | (71) Receivers (122) With Particular Circuit Means (123) Amplifier |
| 325/124 | (71) Receivers (122) With Particular Circuit Means (123) Amplifier (124) Reflex |
| 325/125 | (71) Receivers (122) With Particular Circuit Means (125) Discriminator or Demodulator |
| 325/126 | (71) Receivers (122) With Particular Circuit Means (126) Coupling or Decoupling Between Stages |
| 325/127 | (71) Receivers (127) With Particular Power or Bias Supply |