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Door chain device
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Patent number 5,076,624
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Issue date Dec 31, 1991
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Motohiro Gotanda
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Locking device
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Patent number 5,029,912
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Issue date Jul 9, 1991
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Motohiro Gotanda
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Door chain-locking device
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Patent number 4,993,760
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Issue date Feb 19, 1991
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Motohiro Gotanda
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Gas shut-off device
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Patent number 4,974,624
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Issue date Dec 4, 1990
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Motohiro Gotanda
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Door unlocking device
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Patent number 4,679,834
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Issue date Jul 14, 1987
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Motohiro Gotanda
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Lock device
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Patent number 4,399,673
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Issue date Aug 23, 1983
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Motohiro Gotanda
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Locking device
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Patent number 4,376,379
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Issue date Mar 15, 1983
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Motohiro Gotanda
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES