Mitsumasa Ohtaka

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Aichi Prefecture, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method and device for manufacturing bellows pipe
- Patent number 5,056,346
- Issue date Oct 15, 1991
- Usui Kikusai Sangyo Kaisha, Limited
- Mitsumasa Ohtaka
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...