Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4356645 | Variable wing plow blade and mounting structure therefor | Robert D. Mathis | 1982-11-02 |
| 4249323 | Variable wing plow blade and mounting structure therefor | Robert D. Mathis | 1981-02-10 |