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Class Information
Number: 455/150.1
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Signal selection based on frequency (e.g., tuning)
Description: Subject matter comprising means to cause the receiver to respond, selectively, to any one of two or more carrier waves.

Sub-classes under this class:

Class Number Class Name Patents
455/188.1 Band selection 254
455/179.1 Channel or station selection 214
455/161.1 Frequency scanning 269
455/196.1 Including variation of local oscillator frequency 131
455/160.1 Plural tuning modes (e.g., manual and scanning, etc.) 77
455/151.1 Remote control of channel or station selection 102
455/195.1 Variable voltage or current tuning 152
455/193.1 With antenna circuit tuning 214
455/192.1 With frequency control 140
455/154.1 With indication of frequency, channel, or selector condition (e.g., tuning aid) 157
455/170.1 With mechanical or electromechanical selection 27
455/194.1 With muting (e.g., silent tuning) 78
455/200.1 With other control (e.g., volume, gain, bandwidth, etc.) 149

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
5726640 System and method for scheduling the transmission of pages having different protocols Mar. 10, 1998
5621767 Method and device for locking on a carrier signal by dividing frequency band into segments for segment signal quality determination and selecting better signal quality segment Apr. 15, 1997
5554892 Signal processing circuit for switch capable of reducing insertion loss Sep. 10, 1996
5530701 Network link controller Jun. 25, 1996
5361405 Aircraft band radio receiver which does not radiate interfering signals Nov. 1, 1994
5263183 Radio antenna tuning circuit Nov. 16, 1993
4802239 Switch distributing apparatus for community reception Jan. 31, 1989
4736171 Adaptive microwave channelization Apr. 5, 1988
4723320 Dual communication link for satellite TV receiver Feb. 2, 1988
4672687 Polarity switch for satellite television receiver Jun. 9, 1987
4355422 Tunable radio receiver with detuning prevention due to power supply variations Oct. 19, 1982
4198604 Heterodyne phase lock system Apr. 15, 1980
4069455 Arrangement for maintaining reception of a radio receiver on the stronger of two signals Jan. 17, 1978
4041399 Semiconductor varactor device and electronic tuner using same Aug. 9, 1977
4031334 Apparatus for magnetic recording and/or reproducing of signals received by one or more signal receiving devices Jun. 21, 1977

1 2 3 4 5 6

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