Atsushi Iwasa

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Applicator
- Patent number 7,837,404
- Issue date Nov 23, 2010
- Mitsubishi Pencil Co., Ltd.
- Atsushi Iwasa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Free-ink type writing instrument
- Patent number 6,517,273
- Issue date Feb 11, 2003
- Mitsubishi Pencil Kabushiki Kaisha
- Takao Koyama
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Free-ink type writing instrument
- Patent number 6,443,649
- Issue date Sep 3, 2002
- Mitsubishi Pencil Kabushiki Kaisha
- Takao Koyama
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
Applicator
- Publication number 20080193197
- Publication date Aug 14, 2008
- Mitsubishi Pencil Co., Ltd.
- Atsushi Iwasa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
FREE-INK TYPE WRITING INSTRUMENT
- Publication number 20020131808
- Publication date Sep 19, 2002
- Takao Koyama
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
Free-ink type writing instrument
- Publication number 20020081142
- Publication date Jun 27, 2002
- Takao Koyama
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES