Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4336983 | Photographic objective stabilized against change of angular field during focusing | Kazuo Tanaka | 1982-06-29 |
| 4318593 | Zoom lens assembly with two movable focusing lens groups | Noritsugu Hirata, Kazuo Tanaka | 1982-03-09 |