Shin Shimoyama

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Soka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Pencil lead composition with magnesium oxysulfate fibrous material
- Patent number 4,668,572
- Issue date May 26, 1987
- Pentel Kabushiki Kaisha
- Fumio Iizuka
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...