Syuji Ichikawa

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Yokohama-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Ink composition for aqueous ink ball point pen and aqueous ink ball...
- Patent number 8,562,235
- Issue date Oct 22, 2013
- Mitsubishi Pencil Co., Ltd.
- Hideaki Toomi
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Refill for oil-based ink ballpoint pen and oil-based ink ballpoint pen
- Patent number 6,945,726
- Issue date Sep 20, 2005
- Mitsubishi Pencil Co. Ltd.
- Syuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
INK COMPOSITION FOR AQUEOUS INK BALL POINT PEN AND AQUEOUS INK BALL...
- Publication number 20120251222
- Publication date Oct 4, 2012
- Mitsubishi Pencil Co., Ltd.
- Hideaki Toomi
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
Refill for oil-based ink ballpoint pen and oil-based ink ballpoint pen
- Publication number 20050123341
- Publication date Jun 9, 2005
- Mitsubishi Pencil Co., Ltd.
- Syuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES