Stephen E. Kerman

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Merrick, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Key telephone call signalling circuit
- Patent number 4,185,173
- Issue date Jan 22, 1980
- Nippon Tsu Shin Kogyo K.K.
- Stephen E. Kerman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Pulse counting circuit
- Patent number 4,087,649
- Issue date May 2, 1978
- Nippon Tsu Shin Kogyo K.K.
- Stephen E. Kerman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone intercom line system
- Patent number 4,081,624
- Issue date Mar 28, 1978
- Nippon Tsu Shin Kogyo K.K.
- Stephen E. Kerman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE