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Takashi Utsumi
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Yokohama, JP
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last 30 patents
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Patent Grant
Aluminum treatment with alkaline solution and tannin
Patent number
4,163,679
Issue date
Aug 7, 1979
Oxy Metal Industries Corporation
Yoshio Nagae
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...