Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9752326 | Membrane roofing | David P. Kraus, Jr., Derrick Slowikowski, William H. Shepard, Howard A. Kingsford, Peter C. Garrigus +1 more | 2017-09-05 |
| 9637926 | Membrane roofing | David P. Kraus, Jr., Derrick Slowikowski, William H. Shepard, Howard A. Kingsford, Peter C. Garrigus +1 more | 2017-05-02 |