Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4596496 | Mine roof supporting truss system | Robert W. Hill, Jerry E. Frease | 1986-06-24 | $136,000 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4596496 | Mine roof supporting truss system | Robert W. Hill, Jerry E. Frease | 1986-06-24 | $136,000 |