Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6832443 | Cutting chain | Martin Roy Piel | 2004-12-21 |
| 6684538 | Cutting tooth for a trencher chain | Larry James Rumer, Jerome Robillard | 2004-02-03 |
| 6154987 | Cutting tooth for a trencher chain | Larry James Rumer | 2000-12-05 |
| 6014826 | Chain for trencher apparatus | Craig B. Walgren | 2000-01-18 |