Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7816866 | Photocathode comprising a plurality of openings on an electron emission layer | Kazutoshi Nakajima, Minoru Niigaki, Toru Hirohata | 2010-10-19 |
| 7365356 | Photocathode | Toru Hirohata, Minoru Niigaki, Masami Yamada | 2008-04-29 |
| 7176625 | Photocathode plate and electron tube | Minoru Niigaki, Toru Hirohata, Kuniyoshi Mori | 2007-02-13 |
| 6903363 | Photocathode | Toru Hirohata, Minoru Niigaki, Masami Yamada | 2005-06-07 |
| 6563264 | Photocathode and electron tube | Minoru Niigaki, Toru Hirohata, Hirofumi Kan | 2003-05-13 |