Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5907281 | Swimmer location monitor | Benjamin K. Miller, Jr., James E. Halwachs | 1999-05-25 |
| 4271407 | Tunnel roof monitor employing an induction coil extensometer | Robert F. Kehrman, Michael G. Gibbons, David L. Swigert | 1981-06-02 |