Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4894546 | Hollow cathode ion sources | Ryota Fukui, Kenichi Takagi, Kazuo Takayama, Akira Tonegawa | 1990-01-16 |
| 4841197 | Double-chamber ion source | Kazuo Takayama, Eiji Yabe, Kenichi Takagi, Ryota Fukui | 1989-06-20 |