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Kenji Tsukamoto
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Sakai, JP
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last 30 patents
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Patent Grant
Process for producing hollow extrudate for use in vacuum
Patent number
4,828,937
Issue date
May 9, 1989
Showa Aluminum Corporation
Yutaka Kato
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Patent Grant
Substrate for amorphous silicon solar cells
Patent number
4,806,436
Issue date
Feb 21, 1989
Showa Aluminum Corporation
Kiyoshi Tada
H01 - BASIC ELECTRIC ELEMENTS