Keiichi Okumura

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Sheet take-up device for a projection screen and the like
- Patent number 6,529,323
- Issue date Mar 4, 2003
- Keiichi Okumura
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS

Patents Applicationslast 30 patents

Information Patent Application
Sheet take-up device for a projection screen and the like
- Publication number 20020048083
- Publication date Apr 25, 2002
- Keiichi Okumura
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS