Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5107449 | Distance measuring device | — | 1992-04-21 |
| 5060004 | Distance measuring device | — | 1991-10-22 |
| 5043564 | Dual integration type electro-optical distance measuring device wherein the first integration time is reverse integrated | — | 1991-08-27 |
| 4983998 | Flash device for camera | Michio Hirohata, Kazuo Ikawa | 1991-01-08 |
| 4866471 | Battery check device for camera | — | 1989-09-12 |
| 4728977 | Device for protecting the photographic optical system of camera | Shinya Yomogizawa | 1988-03-01 |