Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4770253 | Grader blade with tiered inserts on leading edge | Edmund Isakov, John F. Kita, Earle W. Stephenson | 1988-09-13 |
| 4715450 | Grader blade with casting/insert assembly on leading edge | Edmund Isakov, Earle W. Stephenson, Don C. Rowlett | 1987-12-29 |