Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6002141 | Method of using photocathode and method of using electron tube | Toru Hirohata, Masami Yamada, Katsuyuki Kinoshita | 1999-12-14 |
| 5986387 | Transmission type electron multiplier and electron tube provided | Toru Hirohata, Hirofumi Kan, Masami Yamada | 1999-11-16 |
| 5982094 | Electron tube with polycrystalline diamond photocathode | Toru Hirohata, Hirofumi Kan, Masami Yamada | 1999-11-09 |
| 5959400 | Electron tube having a diamond field emitter | Toru Hirohata, Hirofumi Kan, Masami Yamada | 1999-09-28 |
| 5923045 | Semiconductor photocathode and semiconductor photocathode apparatus using the same | Tokuaki Nihashi | 1999-07-13 |
| 5747826 | Photoemitter electron tube, and photodetector | Toru Hirohata, Tuneo Ihara, Masami Yamada | 1998-05-05 |
| 5710435 | Photomultiplier having a photocathode comprised of semiconductor material | Toru Hirohata, Tomoko Suzuki, Masami Yamada | 1998-01-20 |
| 5680007 | Photomultiplier having a photocathode comprised of a compound semiconductor material | Toru Hirohata, Tomoko Suzuki, Masami Yamada | 1997-10-21 |
| 5591986 | Photoemitter electron tube and photodetector | Toru Hirohata, Tuneo Ihara, Masami Yamada | 1997-01-07 |
| 5471051 | Photocathode capable of detecting position of incident light in one or two dimensions, phototube, and photodetecting apparatus containing same | Katsuyuki Kinoshita, Toru Hirohata, Tuneo Ihara, Masami Yamada, Norio Asakura +2 more | 1995-11-28 |
| 5138191 | Photoemitter | Yoshihiko Mizushima, Toru Hirohata, Tsuneo Ihara, Kenichi Sugimoto, Koichiro Oba +2 more | 1992-08-11 |
| 4605600 | Transparent GaAs photoelectric layer | Tokuaki Nihashi, Masashi Ohta | 1986-08-12 |