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Error rate detector
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Patent number 4,385,383
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Issue date May 24, 1983
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GTE Automatic Electric Laboratories, Inc.
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Robert A. Karchevski
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G06 - COMPUTING CALCULATING COUNTING
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Interrupt expander circuit
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Patent number 4,275,458
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Issue date Jun 23, 1981
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GTE Automatic Electric Laboratories Incorporated
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M. Ibrahim Khera
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G06 - COMPUTING CALCULATING COUNTING
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Remote time and charge system
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Patent number 4,275,272
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Issue date Jun 23, 1981
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GTE Automatic Electric Laboratories Incorporated
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Michael F. Mennino
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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