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Walking assistance crutch
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Patent number 5,725,005
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Issue date Mar 10, 1998
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Ohta Inc. (Ohta Kabushiki Kaisha)
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Takuya Yamasaki
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Adjustable hinge
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Patent number 5,245,727
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Issue date Sep 21, 1993
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Ohta Co., Ltd.
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Yoshito Sasaki
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Hinge
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Patent number 4,407,044
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Issue date Oct 4, 1983
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Ohta Company Limited
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Kazuo Iseki
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Self closing hinge
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Patent number 4,347,645
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Issue date Sep 7, 1982
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Ohta Company Limited
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Kazuo Iseki
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Hinge
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Patent number 4,224,715
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Issue date Sep 30, 1980
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Ohta Company Limited
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Kazuo Iseki
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Automatic door closing device
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Patent number 4,196,924
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Issue date Apr 8, 1980
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Ohta Company Limited
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Kazuo Iseki
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES