Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4984944 | Drill bit blade for masonry and rock drill | Donald C. Pennington, Jr. | 1991-01-15 |
| 4633959 | Drill having means for locating cutting bit in a bit holder | — | 1987-01-06 |