Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861191 | Road widener | James J. Plociennik | 1989-08-29 |
| 4818139 | Methods and apparatus for making an asphalt-aggregate pavement | James D. Brock, John P. Renneck | 1989-04-04 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861191 | Road widener | James J. Plociennik | 1989-08-29 |
| 4818139 | Methods and apparatus for making an asphalt-aggregate pavement | James D. Brock, John P. Renneck | 1989-04-04 |