Hiroshi Ohtsuka

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Erasing implement and writing implement provided with erasing imple...
- Patent number 9,994,066
- Issue date Jun 12, 2018
- Mitsubishi Pencil Company, Limited
- Sakae Hayao
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Writing instrument with erasing member
- Patent number 9,409,438
- Issue date Aug 9, 2016
- Mitsubishi Pencil Company, Limited
- Hiroshi Ohtsuka
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
ERASING IMPLEMENT AND WRITING IMPLEMENT PROVIDED WITH ERASING IMPLE...
- Publication number 20150033499
- Publication date Feb 5, 2015
- MITSUBISHI PENCIL COMPANY, LIMITED
- Sakae Hayao
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES