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Donald Dean Huizinga
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Indianapolis, IN, US
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last 30 patents
Information
Patent Grant
Repertory telephone dialer with remote billing capability
Patent number
4,870,679
Issue date
Sep 26, 1989
American Telephone and Telegraph Company
Janice G. Hanna
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Apparatus for controlling the application of telephone line power i...
Patent number
4,488,006
Issue date
Dec 11, 1984
AT&T Bell Laboratories
Terrence L. Essig
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital conferencing method and arrangement
Patent number
4,416,007
Issue date
Nov 15, 1983
Bell Telephone Laboratories, Incorporated
Donald D. Huizinga
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Dial pulsing circuit
Patent number
4,413,159
Issue date
Nov 1, 1983
Bell Telephone Laboratories, Incorporated
Donald D. Huizinga
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Key telephone station set circuit
Patent number
4,046,972
Issue date
Sep 6, 1977
Bell Telephone Laboratories, Incorporated
Donald Dean Huizinga
H04 - ELECTRIC COMMUNICATION TECHNIQUE