Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4271407 | Tunnel roof monitor employing an induction coil extensometer | Robert F. Kehrman, Arnold J. Farstad, David L. Swigert | 1981-06-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4271407 | Tunnel roof monitor employing an induction coil extensometer | Robert F. Kehrman, Arnold J. Farstad, David L. Swigert | 1981-06-02 |