Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6069737 | Optical arrangement with a diffractive optical element | Gerhard H. Alt | 2000-05-30 |
| 5080457 | Apparatus for generating a light curtain | Zeljko Jaksic | 1992-01-14 |
| 4899041 | Light sensor for detecting an object in a certain distance | Thomas Meinert | 1990-02-06 |
| 4875761 | Light curtain apparatus | — | 1989-10-24 |
| 4851913 | Picture recording apparatus | Heinrich Hippenmeyer | 1989-07-25 |
| 4798965 | Optical autocollimation measuring apparatus | Klaus Smetana | 1989-01-17 |
| 4794258 | Spectroanalytical gas measuring apparatus | Jurgen Kaufmann, Hans-Jurgen Schneider, Frank Strohbusch | 1988-12-27 |
| 4632500 | Rotatable mirror arrangement for generating a scanning beam which is displaced in steps parallel to itself | — | 1986-12-30 |
| 4603976 | Optical mark recognition apparatus | Jurgen Erdmann | 1986-08-05 |
| 4464014 | Retroreflectors, especially for beam scanning applications and beam scanning apparatus incorporating such retroreflectors | Erwin Sick, Hermann Winterer | 1984-08-07 |
| 4402609 | Light curtain apparatus | Horst Biehrer | 1983-09-06 |
| 4346293 | Optical electronic distance sensor with a parallel beam of light and adjustable detector-emitter separation | — | 1982-08-24 |
| 4339660 | Reflection light barrier apparatus for recognizing both strongly and weakly reflecting objects | Karl O. Buchholz, Jurgen Erdmann | 1982-07-13 |
| 4310756 | Light grid arrangement using cyclically switched semiconductor light sources | Erwin Sick | 1982-01-12 |
| 4283623 | Reading apparatus for reading colored markings applied to objects | Walter von Stein | 1981-08-11 |
| 4196961 | Optical apparatus for correcting the spherical aberration of a spherical concave mirror | Arthur Walter | 1980-04-08 |