Eiji Wasai

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Fujioka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Low-viscosity aqueous ink for a ball-point pen and a ball-point pen
- Patent number 5,929,135
- Issue date Jul 27, 1999
- Mitsubishi Pencil Kabushiki Kaisha
- Eiji Wasai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES