Nobuyuki Akaguma

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Chiba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Screw head structure
- Patent number 5,240,398
- Issue date Aug 31, 1993
- Sumitomo Heavy Industries, Ltd.
- Nobuyuki Akaguma
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL