Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4451146 | Test device for determining the extinction value of a laser range finder | Ludger Grage | 1984-05-29 |
| 4432640 | Adjustment and testing device for a laser ranging system | Ludger Grage, Franz Michl | 1984-02-21 |