Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6585299 | Pipe connector | Gerhard Krug, Friedrich Lenze, Martin Schluter | 2003-07-01 |
| 6513840 | Drill rod coupling | Gerhard Krug | 2003-02-04 |
| 6511102 | Pipe connector | Gerhard Krug, Friedrich Lenze | 2003-01-28 |
| 6155613 | Pipe joint | Christoph Bunsen, Thomas Gigowski, Friedrich Lenze, Martin Schluter | 2000-12-05 |
| 5145710 | Method and apparatus for applying a metallic coating to threaded end sections of plastic pipes and resulting pipe | — | 1992-09-08 |
| 5048871 | Screwed pipe joint | Gerd Pfeiffer, Friedrich Lenze, Gerhard Krug, Josef Siekmeyer | 1991-09-17 |
| 4955644 | Drill pipe coupling | Gerd Pfeiffer, Friedrich Lenze | 1990-09-11 |