Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4507608 | Method and arrangement using a pair of resonant circuits for determining and indicating the position of an uneveness in the inner surface of pipes or other types of cylindrical structures | Rigobert Opitz, Heinz Daugart, Hans Baden | 1985-03-26 |
| 4369071 | Process and arrangement for introducing an automatic cleaning mechanism into a gun barrel | Rigobert Opitz, Karl W. Bethmann | 1983-01-18 |