Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6253794 | Conduit in particular for sanitary and heating installation purposes | Franz-Josef Riesselmann, Joerg Claussen | 2001-07-03 |
| 6255623 | Surface heating system formed by a fluid-conducting inner pipe surrounded by a heat-destructible sheathing tube structure | Franz-Josef Riesselmann | 2001-07-03 |