Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883775 | Process for cleaning and protecting semiconductor substrates | — | 1989-11-28 |
| 4878528 | Electric blind | — | 1989-11-07 |
| 4861816 | Polyvinyl chloride resin composition for powder molding | Isao Matsuura, Akira Wakatsuki, Yu Shida | 1989-08-29 |