Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4337410 | Cathode-ray tube face-plate | Josephus J. van der Geer, Marinus Ploeger, Wilhelmus J. Spoor, Gerardus H. A. M. Van der Steen | 1982-06-29 |
| 4316368 | Multi-stage counter-current concentrating method | Jacques P. Roodenrijs | 1982-02-23 |