Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834539 | Spectroscopic ellipsometer | Jean Le Bris | 1989-05-30 |
| 4832432 | Optical switching element between two optical guides and optical switching matrix constituted by these switching elements | — | 1989-05-23 |