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Yoshihiro Otsuka
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Tokyo, JP
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last 30 patents
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Patent Grant
Electrically-driven closure apparatus for building
Patent number
6,230,785
Issue date
May 15, 2001
Sanwa Shutter Corporation
Noriaki Tokuyama
E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Patent Grant
Electrically-driven closure apparatus for building
Patent number
6,125,907
Issue date
Oct 3, 2000
Sanwa Shutter Corporation
Noriaki Tokuyama
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES