Richard F. Challen

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Lynchburg, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Battery saving frequency synthesizer arrangement
- Patent number 4,521,918
- Issue date Jun 4, 1985
- General Electric Company
- Richard F. Challen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Frequency sensing circuit
- Patent number 4,351,032
- Issue date Sep 21, 1982
- General Electric Company
- Richard F. Challen
- G01 - MEASURING TESTING
Information Patent Grant
Tone phase shift detector
- Patent number 4,171,516
- Issue date Oct 16, 1979
- General Electric Company
- Richard F. Challen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Temperature control circuit
- Patent number 4,158,180
- Issue date Jun 12, 1979
- General Electric Company
- Richard F. Challen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital tone generator for use with radio transmitters and the like
- Patent number 4,047,009
- Issue date Sep 6, 1977
- General Electric Company
- Richard F. Challen
- G06 - COMPUTING CALCULATING COUNTING