Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4478149 | Underwater detonating device | Gunter Backstein, Hans W. Unger, Michael Günther, Hendrik Veldhoen | 1984-10-23 |
| 4369709 | Underwater detonating device | Guenter Backstein, Hans W. Unger, Michael Guenther, Hendrik Veldhoen | 1983-01-25 |