Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1020298 | Hand sanitizer dispenser | Gregory R. Harpster | 2024-04-02 |
| 11466421 | Horizontally extendable silt fence | Beth P. Powell, Joshua P. Albright | 2022-10-11 |
| 10415210 | Drive-over berms for protective containment liners | Beth P. Powell, R. Douglas Evans, JR. | 2019-09-17 |
| 8230530 | Protective cover for preventing spilled liquids from flowing into drains or holes | R. Douglas Evans, JR., Patrick E. Healy | 2012-07-31 |
| 7950075 | Protective cover for preventing spilled liquids from flowing into drains or holes | R. Douglas Evans, JR., Patrick E. Healy | 2011-05-31 |
| 7331357 | Leak diverter | — | 2008-02-19 |
| 6743354 | Drain guard catch basin | R. Douglas Evans, JR., Robert J. Starr | 2004-06-01 |
| 6216720 | Siphon adapter | Raymond D. Evans, Jr. | 2001-04-17 |
| 5562047 | Modular spill deck | Frank G. Forney, Mark Shaw, Robert J. Starr | 1996-10-08 |