Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4551650 | Field-emission ion source with spiral shaped filament heater | Hifumi Tamura, Hiroshi Okano | 1985-11-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4551650 | Field-emission ion source with spiral shaped filament heater | Hifumi Tamura, Hiroshi Okano | 1985-11-05 |