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Door alarm device
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Patent number 4,283,718
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Issue date Aug 11, 1981
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Synco National Ltd.
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Edward A. Butler
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Restraining bar with alarm
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Patent number 4,176,347
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Issue date Nov 27, 1979
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Lorraine E. McIntyre
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3755802
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Patent number 3,755,802
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Issue date Aug 28, 1973
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3727210
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Patent number 3,727,210
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Issue date Apr 10, 1973
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3587080
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Patent number 3,587,080
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Issue date Jun 22, 1971
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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3471188
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Patent number 3,471,188
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Issue date Oct 7, 1969
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2818475
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Patent number 2,818,475
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Issue date Dec 31, 1957
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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2295482
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Patent number 2,295,482
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Issue date Sep 8, 1942
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES