Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8797626 | Light quantity adjustment apparatus, lens unit and optical apparatus provided with the same | — | 2014-08-05 |
| 4975730 | Photographic enlarger | Taketoshi Kawamura | 1990-12-04 |