Yoshihiro Ohtsuka

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Opening and closing device for a portable telephone
- Patent number 5,923,751
- Issue date Jul 13, 1999
- Katoh Electrical Machinery Co., Ltd.
- Yoshihiro Ohtsuka
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Device for moving a winding shaft in a building shutter
- Patent number 5,460,216
- Issue date Oct 24, 1995
- Sanwa Shutter Corporation
- Masato Hirao
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS