Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7591574 | Optical element for variable message signs | — | 2009-09-22 |
| 6486860 | Display unit with an LED matrix | — | 2002-11-26 |
| 6150949 | Optical display device | Erwin Baumstark | 2000-11-21 |