Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5935546 | Method for removing traces of heavy metals from concentrated alkali metal chloride solutions down into the range of 0.01 ppm | Carl Heinz Hamann, Peter Schmittinger, Joerg Helling | 1999-08-10 |
| 4727258 | Optoelectronic system for passive range metering | Egon Tyssen | 1988-02-23 |
| 4542299 | Infrared simulator | Egon Tyssen | 1985-09-17 |