Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818351 | Method for the surface treatment of an iron or iron alloy article | Tohru Arai, Hironori Fujita, Yoshihiko Sugimoto, Yukio Ohta, Akira Sato | 1989-04-04 |
| 4804445 | Method for the surface treatment of an iron or iron alloy article | Yukio Ohta, Akira Sato, Tohru Arai, Hironori Fujita, Yoshihiko Sugimoto | 1989-02-14 |
| 4798470 | Pattern printing method and apparatus | Toshiei Kurosaki, Tsuneo Terasawa, Shinji Okazaki, Yoshio Kawamura | 1989-01-17 |