Michael I. Waldman

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Chesterfield, MO, US

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Patents Grantslast 30 patents

Information Patent Grant
Multiline telephone answering system and interface therefore
- Patent number 5,115,464
- Issue date May 19, 1992
- Michael I. Waldman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiline telephone answering system and interface therefor
- Patent number 4,860,338
- Issue date Aug 22, 1989
- Michael I. Waldman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE