Norimichi Kawashima

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Abrasive tools
- Patent number 4,974,373
- Issue date Dec 4, 1990
- Tokyo Magnetic Printing Co., Ltd.
- Norimichi Kawashima
- B24 - GRINDING POLISHING
Information Patent Grant
Abrasives, abrasive tools, and grinding method
- Patent number 4,954,140
- Issue date Sep 4, 1990
- Tokyo Magnetic Printing Co., Ltd.
- Norimichi Kawashima
- B24 - GRINDING POLISHING