Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7545284 | Signaling appliance, in particular a signaling column | Siegfried Neumann, Ronny Lauer | 2009-06-09 |
| 6572242 | Illuminator for a signal lamp | Erich Marquardt, Siegfried Neumann, Juergen Marquardt | 2003-06-03 |