Ansafone Limited

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London, GB

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Patents Grantslast 30 patents

Information Patent Grant
Recording and reproducing means
- Patent number 4,134,141
- Issue date Jan 9, 1979
- Ansafone Limited
- Stephen P. Robinson
- G08 - SIGNALLING
Information Patent Grant
Telephone answering machine busy signal detection devices with swit...
- Patent number 4,105,866
- Issue date Aug 8, 1978
- Ansafone Limited
- Padraig A. Henehan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

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