Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6257673 | Percussion tool for boom mounted hammers | William D. Blackburn | 2001-07-10 |
| 5884978 | Hammer tool for boom mountable power hammer | Richard A. Bell, William D. Blackburn | 1999-03-23 |
| 5873168 | Shear knife with blade insert | Dennis Neal Johnson | 1999-02-23 |