Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9004995 | Wall curb for air treatment system | Irvin Lee Derks, James L. Austermiller | 2015-04-14 |
| 8540557 | Wall curb for air treatment system | Irvin Lee Derks, James L. Austermiller | 2013-09-24 |