Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5531309 | Method and apparatus for detecting fraud or theft in a gaming machine | Raymond Heidel | 1996-07-02 |
| 5483126 | Method of controlling the color temperature in a sodium high-pressure discharge lamp, and apparatus to carry out the method | Michael Boenigk, Klaus Guenther, Teja Tehmann | 1996-01-09 |
| 5481162 | Method of supplying current to a sodium high-pressure discharge lamp, and current supply system | Michael Boenigk, Klaus Guenther, Teja Lehmann | 1996-01-02 |
| 4963796 | High-pressure sodium vapor lamp | Wolfgang Gottschling, Klaus Guenther, Rainer Radtke, Felix Serick | 1990-10-16 |