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Single tone detector
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Patent number 4,326,261
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Issue date Apr 20, 1982
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John T. Peoples
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G01 - MEASURING TESTING
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Testing loaded transmission lines
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Patent number 4,307,267
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Issue date Dec 22, 1981
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Bell Telephone Laboratories, Incorporated
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John T. Peoples
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Loop fault sectionalization
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Patent number 4,229,626
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Issue date Oct 21, 1980
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Bell Telephone Laboratories, Incorporated
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John T. Peoples
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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