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Integrated circuit switch
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Patent number 4,420,794
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Issue date Dec 13, 1983
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Research, Incorporated
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James R. Anderson
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G07 - CHECKING-DEVICES
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Electro-thermal lock
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Patent number 4,117,701
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Issue date Oct 3, 1978
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Luigi Giovanni Del Mei
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G07 - CHECKING-DEVICES
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3901057
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Patent number 3,901,057
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Issue date Aug 26, 1975
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3672191
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Patent number 3,672,191
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Issue date Jun 27, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3660624
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Patent number 3,660,624
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Issue date May 2, 1972
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B60 - VEHICLES IN GENERAL
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3628099
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Patent number 3,628,099
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Issue date Dec 14, 1971
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B60 - VEHICLES IN GENERAL
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3160792
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Patent number 3,160,792
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Issue date Dec 8, 1964
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G07 - CHECKING-DEVICES
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1509594
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Patent number 1,509,594
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Issue date Sep 23, 1924
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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1351973
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Patent number 1,351,973
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Issue date Sep 7, 1920
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H01 - BASIC ELECTRIC ELEMENTS
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1334371
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Patent number 1,334,371
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Issue date Mar 23, 1920
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B60 - VEHICLES IN GENERAL
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1059759
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Patent number 1,059,759
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Issue date Apr 22, 1913
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H01 - BASIC ELECTRIC ELEMENTS