Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 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 | $1,983,000 |