Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889995 | Apparatus for analysis employing electron | Yoshitsugu Tsutsumi, Shinjiro Ueda | 1989-12-26 |
| 4803369 | Purification device for charged particle beam diaphragm | — | 1989-02-07 |