Bernard G. Roche

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Lannion, FR

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Patents Grantslast 30 patents

Information Patent Grant
Telephony apparatus having filter capacitor switched to undergo dis...
- Patent number 4,521,883
- Issue date Jun 4, 1985
- Bernard Roche
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone station with automatic switch-over between pulse code dia...
- Patent number 4,233,475
- Issue date Nov 11, 1980
- Bernard G. Roche
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Synthesizer of multifrequency code signals
- Patent number 4,017,693
- Issue date Apr 12, 1977
- Bernard G. Roche
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Synthesizer of multifrequency code signals
- Patent number 3,999,049
- Issue date Dec 21, 1976
- Bernard G. Roche
- H04 - ELECTRIC COMMUNICATION TECHNIQUE