Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812437 | Silver-deposited catalyst for production of ethylene oxide | Naohiro Nojiri, Tomoatsu Iwakura | 1989-03-14 |
| 4806153 | Method and apparatus for investigating subsurface conditions | Katsuo Sakai, Tadahiko Muromachi | 1989-02-21 |