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Jeffrey D. Stein
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San Diego, CA, US
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last 30 patents
Information
Patent Grant
Auxiliary telephone cradle
Patent number
D269433
Issue date
Jun 21, 1983
Jeffrey D. Stein
D14 - Recording, communication, or information retrieval equipment
Information
Patent Grant
Hook flash signal actuated telephone control device
Patent number
4,387,274
Issue date
Jun 7, 1983
GTI Corporation
Jeffrey D. Stein
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
Clip-on electronic switching and hold devices for telephones
Patent number
4,382,161
Issue date
May 3, 1983
George A. Saer
H04 - ELECTRIC COMMUNICATION TECHNIQUE