Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4897443 | Polysulfide sheeting | Raymond Robinson, Timothy C. P. Lee, Peter Endruscheit, Lothar Hockenberger, Franz Bergmann +1 more | 1990-01-30 |
| 4833018 | Magnetic, hot-melt adhering soundproofing sheet | Karlheinz Bildner | 1989-05-23 |
| 4780362 | Bituminous roofing strip | Ernst Scherp | 1988-10-25 |
| 4774115 | Bituminous strip for bridge-sealing | Ernst Scherp | 1988-09-27 |