Yoshiki Hirai

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for extruding powdered material
- Patent number 5,437,545
- Issue date Aug 1, 1995
- Hitachi Powdered Metals Co., Ltd.
- Yoshiki Hirai
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method and apparatus for extruding powder material
- Patent number 5,409,662
- Issue date Apr 25, 1995
- Hitachi Powdered Metals Co., Ltd.
- Yoshiki Hirai
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method for making cylindrical, iron-based sintered slugs of specifi...
- Patent number 5,201,966
- Issue date Apr 13, 1993
- Hitachi Powdered Metals, Co., Ltd.
- Yoshiki Hirai
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Cylindrical, iron-based sintered slugs of specified porosity for su...
- Patent number 5,129,961
- Issue date Jul 14, 1992
- Hitachi Powdered Metals Co., Ltd.
- Yoshiki Hirai
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method and apparatus for plastically forming helical internal gears...
- Patent number 4,924,690
- Issue date May 15, 1990
- M.H. Center Limited
- Hisanobu Kanamaru
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

Information Patent Application
PREFORMED CHIP MANUFACTURING APPARATUS, PREFORMED CHIP, DUST CORE M...
- Publication number 20220367112
- Publication date Nov 17, 2022
- HIRAI-HPM CO., LTD.
- Yoshiki HIRAI
- B22 - CASTING POWDER METALLURGY
Information Patent Application
AXIAL GAP MOTOR STATOR CORE AND AXIAL GAP MOTOR STATOR CORE MANUFAC...
- Publication number 20220320920
- Publication date Oct 6, 2022
- HIRAI-HPM CO., LTD.
- Yoshiki HIRAI
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER