Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801332 | High strength asphalt cement paving composition | John B. Leonard, Jr., Patrick Clancey | 1989-01-31 |
| 4244747 | Modified asphalt paving compositions | John B. Leonard, Jr. | 1981-01-13 |