Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6830802 | Roofing membrane | Christian Birkner | 2004-12-14 |
| 6360506 | Bituminous roofing membrane, and method of joining two roofing membranes | — | 2002-03-26 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6830802 | Roofing membrane | Christian Birkner | 2004-12-14 |
| 6360506 | Bituminous roofing membrane, and method of joining two roofing membranes | — | 2002-03-26 |