Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6348795 | Crystal resonant frequency sensor | Ralph Pringle, Jr. | 2002-02-19 |
| 6292002 | Crystal resonant frequency sensor | Ralph Pringle, Jr. | 2001-09-18 |
| 5847832 | Moire topographic measurement | Dean H. S. Liskow, James P. Kelly, Joseph N. Paranto | 1998-12-08 |
| 5750896 | Tool joint sensor | Randall S. Page, Sam D. Monaco | 1998-05-12 |