Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5619099 | Electron tubes using insulation material containing little alkali metal | Masayoshi Sahara, Atushi Ishikawa, Chiyoshi Okuyama, Junichi Takeuchi | 1997-04-08 |
| 5598061 | Photomultiplier | Yoshio Fujita, Keiichi Ohishi | 1997-01-28 |