Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833507 | Electron emission device | Akira Shimizu, Akira Suzuki, Masao Sugata, Isamu Shimoda, Masahiko Okunuki | 1989-05-23 |
| 4825082 | Electron emitting apparatus | Masahiko Okunuki, Akira Shimizu, Akira Suzuki, Masao Sugata, Isamu Shimoda | 1989-04-25 |
| 4810934 | Electron emission device | Isamu Shimoda, Akira Shimizu, Akira Suzuki, Masao Sugata, Masahiko Okunuki | 1989-03-07 |