Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5764134 | Police audio identification and distraction device | Brian Carr | 1998-06-09 |
| 4884071 | Wellbore tool with hall effect coupling | — | 1989-11-28 |
| 4845493 | Well bore data transmission system with battery preserving switch | — | 1989-07-04 |
| 4788544 | Well bore data transmission system | — | 1988-11-29 |
| 4698631 | Surface acoustic wave pipe identification system | Joseph L. Kelly, Jr., Paul A. Nysen, Colin A. Hacking | 1987-10-06 |
| 4661932 | Dynamic downhole recorder | Louis H. Barnard | 1987-04-28 |
| 4345657 | Electronic depth indicator for hydraulic drilling machines | — | 1982-08-24 |