Yasuo Ishii

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Yotsukaido, JP

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Patents Grantslast 30 patents

Information Patent Grant
Explosives having powdered ferrite magnet as a tracer dispersed the...
- Patent number 4,363,678
- Issue date Dec 14, 1982
- Tohoku Metal Industries
- Naozumi Nishimura
- C06 - EXPLOSIVES MATCHES