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Roger Edward Holtz
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Indianapolis, IN, US
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last 30 patents
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Patent Grant
Power-up system for line-powered telephones
Patent number
5,943,420
Issue date
Aug 24, 1999
Lucent Technologies, Inc.
Frederick Joseph Bonhomme
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Battery feed circuit for a telephone system
Patent number
4,813,066
Issue date
Mar 14, 1989
American Telephone and Telegraph Company, AT&T Information Systems
Roger E. Holtz
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Telephone ringing extender
Patent number
4,144,408
Issue date
Mar 13, 1979
Bell Telephone Laboratories, Incorporated
Roger E. Holtz
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Amplifier circuit for increasing transmit and receive levels in a t...
Patent number
3,963,876
Issue date
Jun 15, 1976
Bell Telephone Laboratories, Incorporated
Roger Edward Holtz
H04 - ELECTRIC COMMUNICATION TECHNIQUE