Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6108921 | Scraper for determining the position of pipelines | — | 2000-08-29 |
| 5675084 | Method and device for testing gas carrying pipelines | — | 1997-10-07 |
| 4807484 | Apparatus for the measurement and non-destructive material testing of laid pipelines | — | 1989-02-28 |
| 4769598 | Apparatus for electromagnetically testing the walls of pipelines | Gunther Krieg | 1988-09-06 |
| 4274553 | Safety spraying device | Heinz Evers | 1981-06-23 |