Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4368604 | Insulating panel for roof coverings | Paul Spielau, Peter Putz, Richard Weiss | 1983-01-18 |
| 4282697 | Insulating panel for roof coverings | Paul Spielau, Peter Putz, Richard Weiss | 1981-08-11 |