Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5564967 | Method for sharpening a chipper knife | — | 1996-10-15 |
| 5417263 | Log chipper for lowering peak power requirements and raising chip quality | — | 1995-05-23 |
| 5409047 | Chipper knife | — | 1995-04-25 |
| 4566371 | Variable pneumatic pressure force-transmitting mechanism | Robert T. Ackerman | 1986-01-28 |