Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6823642 | Roof demand and zone based roofing system | Harold G. Simpson, Leo E. Neyer | 2004-11-30 |
| 6588170 | Zone based roofing system | Harold G. Simpson, Leo E. Neyer | 2003-07-08 |
| 5129151 | Roof panel module gauge | Kwon S. Kim, Dennis Watson | 1992-07-14 |