Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4524296 | Cathode structure for electron tube | Yukio Takanashi, Toshiharu Higuchi, Touru Yakabe | 1985-06-18 |
| 4338542 | Directly heated cathode assembly | Yukio Takanashi, Toshiharu Higuchi | 1982-07-06 |