Naoyoshi Akiyoshi

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing a semiconductor substrate material
- Patent number 5,905,938
- Issue date May 18, 1999
- Toho Kinzoku Co., Ltd.
- Naoyoshi Akiyoshi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Copper-tungsten alloys and their manufacturing methods
- Patent number 5,889,220
- Issue date Mar 30, 1999
- Toho Kinzoku Co, Ltd
- Naoyoshi Akiyoshi
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method of manufacturing molded copper-chromium family metal alloy a...
- Patent number 5,689,796
- Issue date Nov 18, 1997
- Citizen Watch Co., Ltd.
- Takao Kasai
- B22 - CASTING POWDER METALLURGY