Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6198081 | Welding sleeve of thermoplastic material with indicator | Alfred Messmer, Dirk Petry | 2001-03-06 |
| 5772824 | Process and means for welding corrugated tubes and/or compound tubes and weld connection produced thereby | Dirk Petry | 1998-06-30 |
| 5687996 | Molded part made of thermoplastic material | Helmut Hilger, Dirk Petry | 1997-11-18 |
| 5532459 | Welding sleeve of thermoplastic material | Dirk Petry | 1996-07-02 |
| 5386101 | Method and apparatus for welding tubular parts | Dirk Petry | 1995-01-31 |
| 4927183 | Adapting piece of thermoplastic material | Fritz Reich | 1990-05-22 |