Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865435 | Optical system for rangefinding devices | — | 1989-09-12 |
| 4812866 | Photographic film package | Seimei Ushiro, Hiroshi Ohmura, Tsutomu Tanaka, Yasuhiko Tanaka, Seiji Asano +1 more | 1989-03-14 |