Mark Thomas Manfred

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Rockaway, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Dual mode telephone subscriber loop current detector
- Patent number 4,164,713
- Issue date Aug 14, 1979
- Bell Telephone Laboratories, Incorporated
- Stephen J. Brolin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dual mode telephone subscriber loop current detector
- Patent number 4,087,646
- Issue date May 2, 1978
- Bell Telephone Laboratories, Incorporated
- Stephen Joseph Brolin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiparty telephone ringing
- Patent number 4,048,448
- Issue date Sep 13, 1977
- Bell Telephone Laboratories, Incorporated
- Ronald Jay Canniff
- H04 - ELECTRIC COMMUNICATION TECHNIQUE