Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4347441 | Dual probe interferometer for object profile measuring | Johannes C. Driessen, Wichert Mesman | 1982-08-31 |
| 4325135 | Optical record carrier and apparatus for reading it | Jacobus P. J. Heemskerk | 1982-04-13 |
| 4310916 | Optical record carrier and apparatus for reading it | — | 1982-01-12 |