Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6577572 | Apparatus for reproduction or recording data or information with a photodetector and digital error signal and evaluation signal processing | Michael Grimm, Steffen Lehr, Heinrich Schemmann | 2003-06-10 |
| 6539036 | Laser control loop with automatic adaptation to the monitoring signal polarity | Steffen Lehr | 2003-03-25 |
| 5298898 | Digital to analog converter with digital correction circuitry | — | 1994-03-29 |