Yuji Yamasawa

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Hitachiota, JP

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Patents Grantslast 30 patents

Information Patent Grant
Motor speed control method and apparatus with drooping compensation...
- Patent number 5,256,944
- Issue date Oct 26, 1993
- Hitachi, Ltd.
- Masahiro Tobise
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...