Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6300711 | Indirectly heated cathode with a thermal absorption layer on the sleeve and cathode ray tube | Yoji Yamamoto | 2001-10-09 |
| 5959395 | Cathode for electron tube | Hiroshi Sakurai, Yoshiki Hayashida, Masayuki Kubo | 1999-09-28 |