Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4251746 | Direct-heated cathode structure | Takao Kawamura, Yukihiro Izumida, Hiroshi Fukushima, Masaru Nakazawa, Tetsuo Kumazawa | 1981-02-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4251746 | Direct-heated cathode structure | Takao Kawamura, Yukihiro Izumida, Hiroshi Fukushima, Masaru Nakazawa, Tetsuo Kumazawa | 1981-02-17 |