Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5704592 | Expandable safety barrier | James Morish Polkinghorne | 1998-01-06 |
| D336524 | Speed restriction hump | James Morish Polkinghorne | 1993-06-15 |
| 4689888 | Measuring device for use with automotive frame straightening equipment | Roger B. Aldrich | 1987-09-01 |
| 4344314 | Alignment apparatus | Roger B. Aldrich | 1982-08-17 |