Eiji Ohta

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Process for forming passivated film
- Patent number 5,407,492
- Issue date Apr 18, 1995
- Osaka Sanso Kogyo Ltd.
- Tadahiro Ohmi
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Metal tube oxidation treatment apparatus
- Patent number 5,295,668
- Issue date Mar 22, 1994
- Osaka Sanso Kogyo Kabushiki-Kaisha
- Tadahiro Ohmi
- C21 - METALLURGY OF IRON