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Repeater monitoring and fault location
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Patent number 4,025,737
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Issue date May 24, 1977
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Bell Telephone Laboratories, Incorporated
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Sherman Theodore Brewer
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Automatic repeater stressing
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Patent number 4,000,467
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Issue date Dec 28, 1976
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Bell Telephone Laboratories, Incorporated
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George Howard Lentz
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2876341
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Patent number 2,876,341
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Issue date Mar 3, 1959
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2875327
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Patent number 2,875,327
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Issue date Feb 24, 1959
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2864943
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Patent number 2,864,943
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Issue date Dec 16, 1958
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2835792
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Patent number 2,835,792
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Issue date May 20, 1958
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2524861
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Patent number 2,524,861
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Issue date Oct 10, 1950
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2307319
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Patent number 2,307,319
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Issue date Jan 5, 1943
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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1831744
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Patent number 1,831,744
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Issue date Nov 10, 1931
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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1821005
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Patent number 1,821,005
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Issue date Sep 1, 1931
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H04 - ELECTRIC COMMUNICATION TECHNIQUE