Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4280019 | Combination acoustic conditioner and light fixture | Robert L. Propst, Travis M. Randolph | 1981-07-21 |
| 4214298 | Combination acoustic conditioner and light fixture | Robert L. Propst, Travis M. Randolph | 1980-07-22 |