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Telautograph system
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Patent number 4,631,355
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Issue date Dec 23, 1986
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AT&T Bell Laboratories
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Joseph Federico
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G06 - COMPUTING CALCULATING COUNTING
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DC-to-DC Converters utilizing FET devices
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Patent number 4,349,776
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Issue date Sep 14, 1982
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Bell Telephone Laboratories, Incorporated
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Joseph Federico
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Single polarity circuit
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Patent number 4,319,144
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Issue date Mar 9, 1982
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Bell Telephone Laboratories, Incorporated
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William C. King
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H03 - BASIC ELECTRONIC CIRCUITRY
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Signal corrected optocoupled device
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Patent number 4,190,747
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Issue date Feb 26, 1980
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Bell Telephone Laboratories, Incorporated
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Alexander Feiner
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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