Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861043 | Pressure/compression concrete joint seal | Joseph R. Anderson, John Michael Engstrom | 1989-08-29 |
| 4778304 | Pavement joint reworking apparatus | John D. Ward | 1988-10-18 |