Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6665991 | Seam plate for retaining roof decking membrane | — | 2003-12-23 |
| 6205730 | Roofing plate for securing roofing membrane | Paul M. Larson, Gareth Wallace | 2001-03-27 |
| 6142352 | Roofing washer-dispensing and fastener-driving machine | Paul M. Larson, Sigismund G. Paul | 2000-11-07 |
| 5921454 | Roofing washer-dispensing and fastener-driving machine | Paul M. Larson, Sigismund G. Paul | 1999-07-13 |
| 5711116 | Polymer batten with adhesive backing | — | 1998-01-27 |
| 5707191 | Stress plate with angled hole | Dave C. Hempfling | 1998-01-13 |
| 4757661 | Washer with axial ribs | — | 1988-07-19 |
| 4712959 | Washer with resilient head cripping means | — | 1987-12-15 |
| 4663910 | Washer for roofing insulation | — | 1987-05-12 |