Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855123 | Method of oxidizing sulfide-containing liquor | Masayuki Suzuki, Kuniaki Kimura, Takeo Ono, Munekazu Nakamura, Yoshihiro Ohguchi | 1989-08-08 |
| 4839762 | Rotary head device | Kou Yoneda, Hideaki Miyakawa | 1989-06-13 |