Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864123 | Apparatus for detecting the level of an object surface | Isao Sato, Masato Shibuya | 1989-09-05 |
| 4801977 | Projection optical apparatus | Shoji Ishizaka, Susumu Makinouchi, Akikazu Tanimoto | 1989-01-31 |