Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4335493 | Cutting tooth extractor for stump cutting and digging apparatuses | Norman E. Shivers, Jr., David E. Shivers | 1982-06-22 |
| 4271879 | Hydraulic stump cutting and digging apparatus | Norman E. Shivers, Jr., David E. Shivers | 1981-06-09 |