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Class Information
Number: 455/45
Name: Telecommunications > Transmitter and receiver at separate stations > Frequency or phase modulation > Via subcarrier
Description: Subject matter where an intermediate frequency wave is modulated by a modulating signal representative of an intelligence or message and in turn is applied as a modulation signal to a main carrier wave, either alone or in conjunction with other subcarriers.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6353462 |
Television signal and FM broadcast signal demodulator and television signal and FM broadcast signal receiver |
Mar. 5, 2002 |
| 6347120 |
Communication method, transmitter, receiver, and cellular radio communication system |
Feb. 12, 2002 |
| 6330334 |
Method and system for information dissemination using television signals |
Dec. 11, 2001 |
| 6249642 |
Extended play radio vision cassette recorder system and method of operating same |
Jun. 19, 2001 |
| RE37131 |
Apparatus and methods for music and lyrics broadcasting |
Apr. 10, 2001 |
| 6195534 |
Communication method, transmitter, receiver, wherein subcarriers are used to transmit digital header and message data in a cellular radio communications system |
Feb. 27, 2001 |
| 6163683 |
Broadcast data radio system and receiver apparatus therefor |
Dec. 19, 2000 |
| 6161002 |
Apparatus and method for the reception of radio signals transmitted by RDS system |
Dec. 12, 2000 |
| 6148178 |
Selective call message formatting |
Nov. 14, 2000 |
| 6141536 |
Diversity radio system with RDS |
Oct. 31, 2000 |
| 6112063 |
Automatic radio station memory programming |
Aug. 29, 2000 |
| 6111613 |
Receiver for television multiplex broadcasting |
Aug. 29, 2000 |
| 6088577 |
Multiple subcarrier communication system |
Jul. 11, 2000 |
| 6081699 |
FM multiplex broadcasting receiver for receiving RDS and DARC signals |
Jun. 27, 2000 |
| 6070064 |
Information receiving system and a control method thereof |
May. 30, 2000 |
| 6067445 |
Dual channel dual speed FM subcarrier paging system |
May. 23, 2000 |
| 6038434 |
Method of and apparatus for receiving and displaying RDS data |
Mar. 14, 2000 |
| 5960328 |
FM radio receiver and signal processing device used therein |
Sep. 28, 1999 |
| 5950117 |
Car radio receiver comprising a memory for storing predetermined vocabulary elements |
Sep. 7, 1999 |
| 5930687 |
Apparatus and method for generating an AM-compatible digital broadcast waveform |
Jul. 27, 1999 |
| 5913152 |
FM composite signal processor |
Jun. 15, 1999 |
| 5907793 |
Telephone-based interactive broadcast or cable radio or television methods and apparatus |
May. 25, 1999 |
| 5890910 |
Method of managing information files in a communication karaoke apparatus and a communication karaoke apparatus |
Apr. 6, 1999 |
| 5890053 |
Automatic display mode for a multiplex broadcasting receiver |
Mar. 30, 1999 |
| 5881365 |
Digital compressed voice paging system which uses R.D.S. format for the ID signals and S.C.A. format for the voice signals both formats being FM subcarriers |
Mar. 9, 1999 |
| 5870682 |
Receiver for adaptively displaying a plurality of data pages |
Feb. 9, 1999 |
| 5862104 |
Recording a complete broadcast program by selecting from a displayed program text |
Jan. 19, 1999 |
| 5857149 |
Multibroadcast receiver for extracting desired broadcast information based on an identification code |
Jan. 5, 1999 |
| 5825756 |
Receiver for FM data multiplex broadcasting |
Oct. 20, 1998 |
| 5819160 |
Programmable radio subscription system for receiving selectively defined information |
Oct. 6, 1998 |
| 5812937 |
Broadcast data system with multiple-tuner receiver |
Sep. 22, 1998 |
| 5790958 |
Radio reception system for general purpose computer |
Aug. 4, 1998 |
| 5784686 |
IQ combiner technology in modulated backscatter system |
Jul. 21, 1998 |
| 5757782 |
Paging system with multiple baseband subcarriers |
May. 26, 1998 |
| 5751806 |
Audio information dissemination using various transmission modes |
May. 12, 1998 |
| 5740518 |
FM character data multiplex broadcasting signal receiving apparatus |
Apr. 14, 1998 |
| 5740519 |
Method for the time-correlated transmission of a control signal and a radio program signal |
Apr. 14, 1998 |
| 5734965 |
On-board unit for transponder operation |
Mar. 31, 1998 |
| 5722047 |
Receiver for receiving multiplexed text broadcasts |
Feb. 24, 1998 |
| 5708478 |
Computer system for enabling radio listeners/television watchers to obtain advertising information |
Jan. 13, 1998 |
| 5666660 |
System for receiving a radio signal including multiple receiving units |
Sep. 9, 1997 |
| 5661787 |
System for on-demand remote access to a self-generating audio recording, storage, indexing and transaction system |
Aug. 26, 1997 |
| 5659891 |
Multicarrier techniques in bandlimited channels |
Aug. 19, 1997 |
| 5649297 |
Transmitting digital data using multiple subcarriers |
Jul. 15, 1997 |
| 5640683 |
Modulated backscatter wireless communication system having an extended range |
Jun. 17, 1997 |
| 5613210 |
Telecommunication network for transmitting information to a plurality of stations over a single channel |
Mar. 18, 1997 |
| 5604921 |
Radiotelephone user interface for broadcast short message service |
Feb. 18, 1997 |
| 5603088 |
Method and apparatus for determining a quality level of an analog signal in a radio communication system |
Feb. 11, 1997 |
| 5590195 |
Information dissemination using various transmission modes |
Dec. 31, 1996 |
| 5584051 |
Radio broadcast transmission system and receiver for incompatible signal formats, and method therefor |
Dec. 10, 1996 |
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