Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823187 | Color television camera having a test pattern projected through a non-incident prism plane | Mitsuaki Toyama, Syohei Kawai, Keizo Kono, Nobuo Shimoda | 1989-04-18 |
| 4740064 | Zoom lens apparatus | Keizo Kono, Syohei Kawai, Yasukazu Tanabe, Hiroshi Yoshinari | 1988-04-26 |