Shigehiro Matsumoto

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Organic fluorescent whitening pigment composition having an excelle...
- Patent number 6,488,867
- Issue date Dec 3, 2002
- Hakkol Chemical Co., Ltd.
- Shigekazu Matsumoto
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Near-infrared ray absorbing polyazo compound
- Patent number 6,140,477
- Issue date Oct 31, 2000
- Hakkol Chemical Co., Ltd.
- Shigekazu Matsumoto
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...