Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6235657 | Laminate with web and laid components | Michael Schops, Bertrand Weiter | 2001-05-22 |
| 5660915 | Bituminous roofing underfelt and base felt therefor | Michael Schoeps, Bertrand Weiter | 1997-08-26 |
| 5656354 | Root-resistant base layer | — | 1997-08-12 |
| 5219635 | Sheathing web | Bertrand Weiter | 1993-06-15 |
| 5130178 | Support web for roofing membranes | Karl-Christian Zerfass, Michael Schops, Hans Wagner, Bertrand Weiter | 1992-07-14 |
| 4987027 | Support web for roof foundation webs | Karl-Christian Zerfass, Michael Schops, Hans Wagner, Bertrand Weiter | 1991-01-22 |
| 4683164 | Nonwoven for manufacturing flameproof roofing sheets | — | 1987-07-28 |
| 4657801 | Nonwoven with fibrous coating | Peter Heidel, Heinz Artus | 1987-04-14 |