Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4957663 | Method of manufacturing optical components | Renso J. M. Zwiers, Johannes M. G. Verhoeven | 1990-09-18 |
| 4738516 | Optical element having an aspheric surface | Johannes M. G. Verhoeven, Albert Smid | 1988-04-19 |
| 4623496 | Method of manufacturing an optical element having an aspheric surface | Johannes M. G. Verhoeven, Albert Smid | 1986-11-18 |
| 4489408 | Beam-splitting prism, method of manufacturing said prism, and optical read and/or write unit provided with said prism | Johannes M. G. Verhoeven | 1984-12-18 |