Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6215603 | Lens holding structure in a lens block forming all or part of an optical system and method of assembling the lens block | Tetsuo Kohno, Masashi Isono, Hiromu Mukai, Kazuhiko Ishimaru | 2001-04-10 |
| 6025961 | Zoom lens system having two lens units | Tetsuo Kohno, Hiroyuki Matsumoto | 2000-02-15 |