Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6581663 | Weld wheel assembly for disposition on a membrane welding machine | Brian Whelan, Paul Eric Peterson, Claus Pfotenhauer | 2003-06-24 |
| 6554947 | Method for attaching thermoplastic strips to thermoplastic roof membranes | Claus Pfotenhauer, Brian Whelan | 2003-04-29 |
| 6533014 | Nozzle for heat welding overlapping roof membranes to each other along separated first and second paths | Brian Whelan, Paul Eric Peterson, Claus Pfotenhauer | 2003-03-18 |
| 6325126 | Nozzle for heat welding overlapping roof membranes to each other along separated first and second paths | Brian Whelan, Paul Eric Peterson, Claus Pfotenhauer | 2001-12-04 |
| 6282857 | Articulating plate assembly for retaining sheets of roofing material on a roof surface | — | 2001-09-04 |
| D446319 | Roof membrane stress plate | — | 2001-08-07 |