Yves J. F. Hetet

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Lannion, FR

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Patents Grantslast 30 patents

Information Patent Grant
Hands free telephone with switchable gain in the two speech signal...
- Patent number 4,454,384
- Issue date Jun 12, 1984
- Telecommunications Radioelectriques et Telephoniques T.R.T.
- Gilbert M. M. Ferrieu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electronic subscriber line interface circuit having means to equali...
- Patent number 4,414,434
- Issue date Nov 8, 1983
- Telecommunications Radioelectriques et Telephoniques T.R.T.
- Gilbert M. M. Ferrieu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for detecting the closure of a subscriber's line during r...
- Patent number 4,356,355
- Issue date Oct 26, 1982
- Telecommunications Radioelectriques et Telephoniques T.R.T.
- Gilbert M. M. Ferrieu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE