Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6215918 | Thermo-optical switch | Norbert Keil, Huihai Yao, Crispin Zawadzki | 2001-04-10 |
| 6094516 | Digital optical switch | Gravert Martin | 2000-07-25 |
| 4856094 | Arrangement for polarization control, such as for an optical heterodyne or homodyne receiver | Helmut Heidrich, Detlef Hoffmann | 1989-08-08 |
| 4832431 | Apparatus for continuous polarization and phase control | Helmut Heidrich, Detlef Hoffmann | 1989-05-23 |