Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4419147 | Phosphating process of metal surface | Ryoichi Murakami, Hideo Shimizu, Takashi Yoshii, Minoru Ishida | 1983-12-06 |
| 4292096 | Phosphating process of metal surface | Ryoichi Murakami, Hideo Shimizu, Takashi Yoshii, Minoru Ishida | 1981-09-29 |