Masachi Hosoya

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing a seal ring for magnetic fluid seal device
- Patent number 5,332,460
- Issue date Jul 26, 1994
- Nippon Seiko Kabushiki Kaisha
- Masachi Hosoya
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL