Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5889614 | Presentation system with overhead projector | Martinus V. C. Stroomer | 1999-03-30 |
| 4918679 | Optical record carrier scanning apparatus providing optoelectronic positioning of the scanning spot | Willem G. Opheij | 1990-04-17 |
| 4826270 | Optical scanning apparatus | Willem G. Opheij | 1989-05-02 |