Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4969671 | Gas-tight joint for pipe linings and risers | Heinz Gross, Matthias Lang, Adolf Peeck, Hans Spliethoff, Wolfgang Venema +2 more | 1990-11-13 |
| 4823847 | Multi-layer helical seam steel pipe | Heinz Grosse, Adolf Peeck, Werner Wennemann | 1989-04-25 |
| 4721536 | Method for making steel tubes or pipes of increased acidic gas resistance | Heinz Grob, Adolf Peeck, Werner Wennemann | 1988-01-26 |
| 4688319 | Multi-layer helical seam steel pipe | Heinz Gross, Adolf Peeck, Werner Wennemann | 1987-08-25 |
| 4621176 | Method of and device for monitoring and/or controlling welding current in the high-frequency resistance pressure welding of pipes with longitudinal seams | Wilfried Kliesch, Hans-Jürgen Wahl, Rolf Krebs, Peter Schorr, Heinz Strauch | 1986-11-04 |
| 4535215 | Method and device for controlling the welding process in the manufacturing of pipes with longitudinal seams | Wilfried Kliesch, Hans-Jürgen Wahl, Rolf Krebs, Peter Schorr, Heinz Strauch | 1985-08-13 |
| 4531409 | Test system for defect determination in welding seams | Hans-Jürgen Wahl | 1985-07-30 |