Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11795638 | Safety truck attachments, and methods of safety truck use | Robert H. Roy, Andrew C. Washburn, Joseph T. Piggott | 2023-10-24 |
| 11408138 | Roadway work area safety truck | Robert H. Roy, Andrew C. Washburn, Joseph T. Piggott | 2022-08-09 |
| 11008717 | Safety truck attachments, and methods of safety truck use | Robert H. Roy, Andrew C. Washburn, Joseph T. Piggott | 2021-05-18 |
| 10801169 | Truck safety modules for assisting workpersons to place and retrieve traffic delineators | Robert H. Roy, Andrew C. Washburn, Joseph T. Piggott | 2020-10-13 |
| 10556545 | Over-cab rack for traffic delineators | Robert H. Roy, Andrew C. Washburn, Joseph T. Piggott | 2020-02-11 |
| 10319227 | Roadway work area safety truck | Robert H. Roy, Andrew C. Washburn, Joseph T. Piggott | 2019-06-11 |