Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5004026 | Felling head | Charles D. MacLennan, Douglas D. Hamilton | 1991-04-02 |
| 4690185 | Rim driven rotary cutter and tree felling head incorporating the same | Douglas D. Hamilton, Hans Viereck | 1987-09-01 |