Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7414356 | Cathode structure including barrier for preventing metal bridging from heater to emitter | Yoji Yamamoto, Satoru Nakagawa | 2008-08-19 |
| 7382086 | Indirectly heated cathode and cathode ray tube having same | — | 2008-06-03 |
| 6992427 | High-yield cathode body, cathode sleeve structure, and cathode-ray tube, cathode sleeve substrate, and cathode body production method | Satoru Nakagawa, Yoji Yamamoto | 2006-01-31 |
| 6882093 | Long-life electron tube device, electron tube cathode, and manufacturing method for the electron tube device | — | 2005-04-19 |
| 6828717 | Electron gun having short length and cathode-ray tube apparatus using such electron gun | Yoji Yamamoto, Satoru Nakagawa | 2004-12-07 |
| 6492765 | Cathode structure for cathode ray tube | — | 2002-12-10 |