Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D996653 | Bollard | David G. Dickinson, James John Burnett | 2023-08-22 |
| 11384493 | Portable barricade and portable barricade system | David G. Dickinson, James John Burnett, Judy L. Manor | 2022-07-12 |
| 10941531 | Portable bollard and barricade system | David G. Dickinson, James John Burnett | 2021-03-09 |
| D903906 | Bollard | David G. Dickinson, James John Burnett | 2020-12-01 |
| 10407852 | Portable bollard and barricade system | David G. Dickinson, James John Burnett | 2019-09-10 |
| 6382869 | Above grade mass displacement trafficway barrier | — | 2002-05-07 |
| 6045293 | Driver intimidating person friendly tire destructive trafficway controller | — | 2000-04-04 |
| 5560733 | Gas pre-charged mass counterbalancing | — | 1996-10-01 |
| RE33201 | Hydraulic safety barrier traffic-way controller | — | 1990-04-17 |
| 4844653 | Cable-beam trafficway barrier | — | 1989-07-04 |
| 4715742 | Manually depressible automatically deployable spring balanced bollard | — | 1987-12-29 |
| 4576508 | Bollard trafficway barrier and vehicle arrest system | — | 1986-03-18 |
| 4490068 | Hydraulic safety barrier traffic-way controller | — | 1984-12-25 |
| 4354771 | Motorized curb barrier traffic-way controller | — | 1982-10-19 |
| 4318079 | Motorized tire barrier and signal barrier traffic-way controller | — | 1982-03-02 |