Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7851982 | Lamp | Richard Franciscus Joseph Feller | 2010-12-14 |
| 5144131 | Device for optically scanning an information plane detecting border portions of light beam | Willem G. Opheij, Christiaan H. F. Velzel | 1992-09-01 |
| 4850673 | Optical scanning apparatus which detects scanning spot focus error | Christiaan H. F. Velzel | 1989-07-25 |
| 4808003 | Arrangement for optically measuring the profile of a radiation reflecting surface | — | 1989-02-28 |
| 4800547 | Optical record carrier scanning apparatus with scanning beam focus error detection | Christiaan H. F. Velzel | 1989-01-24 |
| 4776670 | Optical assembly | Francis J. Span | 1988-10-11 |
| 4431267 | Optical system which provides a collimated light beam | Johan C. J. Finck | 1984-02-14 |