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Goro Yamauchi
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Mito, JP
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last 30 patents
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Patent Grant
Surface-treated magnesium or magnesium-alloy and process for surfac...
Patent number
4,973,393
Issue date
Nov 27, 1990
Nippon Telegraph and Telephone Corp.
Masato Mino
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Surface-treated magnesium or magnesium alloy, and surface treatment...
Patent number
4,770,946
Issue date
Sep 13, 1988
Nippon Telegraph & Telephone Corporation
Goro Yamauchi
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Electric contact material and method of producing the same
Patent number
4,330,331
Issue date
May 18, 1982
Nippon Telegraph & Telephone Public Corporation
Koichi Fujiwara
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...