Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4288266 | Method for heated tool butt welding of tube and pipe of thermoplastic materials | Rudolf Kellersohn, Hans Steck, Josef Schaub | 1981-09-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4288266 | Method for heated tool butt welding of tube and pipe of thermoplastic materials | Rudolf Kellersohn, Hans Steck, Josef Schaub | 1981-09-08 |