Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4916031 | Surface-treated steel plate and bonded structure of metal material | Yoichi Kitamura, Hisashi Hotta | 1990-04-10 |
| 4701354 | Process for surface treatment of metal materials | Yoichi Kitamura, Hisashi Hotta | 1987-10-20 |