Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6813424 | Optical communications link | Gisela Dultz, Erna Frins, Heidrun Schmitzer | 2004-11-02 |
| 6748081 | Quantum cryptography system for a secure transmission of random keys using a polarization setting method | Heidrun Schmitzer, Leonid A. Beresnev, Eric Hildebrandt | 2004-06-08 |
| 6727491 | Sensor and method for detecting changes in distance | Gisela Dultz, Erna Frins, Heidrun Schmitzer | 2004-04-27 |