Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5249883 | Metal plate/asphalt pavement | Ronald D Watson, Reginald Frizzell, Dale Sieben, Ludovit Zanzotto | 1993-10-05 |
| 4904305 | Novel asphaltic composition | Ludo Zanzotto, Albert J. Faber, Royston B. Jeffries, R. David Watson | 1990-02-27 |