Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851673 | Secondary ion mass spectrometer | Eiichi Izumi, Hiroshi Iwamoto, Eisuke Mitani | 1989-07-25 |
| 4841143 | Charged particle beam apparatus | Hifumi Tamura, Kaoru Umemura | 1989-06-20 |