Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11688592 | Photocathode, electron tube, and method for manufacturing photocathode | Terunori Kawai, Masami Shibayama, Hiroyuki Watanabe, Shinichi Yamashita | 2023-06-27 |
| 5140458 | Optical illuminating and observing apparatus | Kazutoshi Takagi, Nobuaki Kitazima | 1992-08-18 |
| 4817620 | Noncontact type tonometer | Kenjiro Katsuragi, Katsuhiko Kobayashi | 1989-04-04 |
| 4632528 | Method for determining refractive index of an object | Hisakazu Yoshino, Kazutoshi Takagi | 1986-12-30 |