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Gravity door hinge
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Patent number 4,631,777
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Issue date Dec 30, 1986
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Takigen Seizou Co. Ltd.
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Hideaki Takimoto
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Self-closing door hinge
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Patent number D285043
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Issue date Aug 12, 1986
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Takigen Seizou Co. Ltd.
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Kunihiko Takasaki
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D08 - Tools and hardware
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Handle device for doors
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Patent number 4,546,628
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Issue date Oct 15, 1985
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Takigen Seizou Co., Ltd.
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Kunihiko Takasaki
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Door handle unit
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Patent number 4,486,041
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Issue date Dec 4, 1984
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Takigen Seizou Co., Ltd.
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Kunihiko Takasaki
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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