Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6931931 | Device for ultrasonic weld seam testing of longitudinally welded pipes for longitudinal and transversal errors | Alfred Graff, Thomas Marcial Kersting, Ludwig Oesterlein | 2005-08-23 |