Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5787668 | Ventilated insulated roofing system with improved resistance to wind uplift | Philip M. Carkner, Todd Corley, Timothy L. Kersey | 1998-08-04 |
| 4641471 | Fastener for securing roofing material to cementitious roof decks | Kenneth E. Young, Robert T. Frohlich | 1987-02-10 |
| 4641472 | Fastener for securing roofing material to cementitious roof decks having removable tab | Kenneth E. Young, Robert T. Frohlich | 1987-02-10 |
| 4627207 | Fastener for securing roofing material to cementitious roof decks having removable tab | Kenneth E. Young, Robert T. Frohlich, Robert L. Hallock | 1986-12-09 |
| 4293341 | Thin section insulating concrete of high strength and low water requirement | Ralph J. Bragg | 1981-10-06 |