Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833507 | Electron emission device | Akira Shimizu, Takeo Tsukamoto, Akira Suzuki, Masao Sugata, Masahiko Okunuki | 1989-05-23 |
| 4824218 | Optical modulation apparatus using ferroelectric liquid crystal and low-resistance portions of column electrodes | Mitsutoshi Kuno, Masahiko Enari, Hitoshi Shindo, Seishiro Yoshioka, Shuzo Kaneko +1 more | 1989-04-25 |
| 4825082 | Electron emitting apparatus | Masahiko Okunuki, Takeo Tsukamoto, Akira Shimizu, Akira Suzuki, Masao Sugata | 1989-04-25 |
| 4820930 | Photomask positioning device | Shinji Tsutsui | 1989-04-11 |
| 4810934 | Electron emission device | Takeo Tsukamoto, Akira Shimizu, Akira Suzuki, Masao Sugata, Masahiko Okunuki | 1989-03-07 |