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Safety edge switch
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Patent number 5,072,080
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Issue date Dec 10, 1991
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Karlheinz Beckhausen
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B60 - VEHICLES IN GENERAL
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Safety door edge
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Patent number 4,115,952
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Issue date Sep 26, 1978
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American Can Company
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Harlan S. French
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3867595
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Patent number 3,867,595
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Issue date Feb 18, 1975
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3838236
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Patent number 3,838,236
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Issue date Sep 24, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3818162
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Patent number 3,818,162
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Issue date Jun 18, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3732384
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Patent number 3,732,384
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Issue date May 8, 1973
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3622723
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Patent number 3,622,723
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Issue date Nov 23, 1971
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3485977
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Patent number 3,485,977
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Issue date Dec 23, 1969
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H01 - BASIC ELECTRIC ELEMENTS
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3478311
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Patent number 3,478,311
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Issue date Nov 11, 1969
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G08 - SIGNALLING