Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5275845 | Method of pretreating connecting elements of a gas-tight sleeve-type pipe connection | Hansjoachim Nimtschek | 1994-01-04 |
| 5069761 | Method for pretreating the connecting elements of a gas-tight pipe connection | Willy Schulte | 1991-12-03 |