Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5092211 | Saw chain having cutter link with central pivot on bottom edge | Donald J. MacGavin | 1992-03-03 |
| 4876796 | Sprocket assembly for chain saws | Eugene E. Calkins | 1989-10-31 |
| 4862593 | Saw chain hook angle gauge | — | 1989-09-05 |
| 4785700 | Cutter link for saw chain having guide surface for sharpening | Duane M. Gibson, Kent L. Huntington, Kenneth R. Day | 1988-11-22 |
| 4625610 | Cutting chain having automatic sharpening | — | 1986-12-02 |