Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7867151 | Dual variable resistance control apparatus and system for exercise equipment | Michael W. Smith | 2011-01-11 |
| 7845269 | Piston with pin bore lubrication features | Gary D. Dowdy, Jeffery D. Wilkerson, John David Overbey | 2010-12-07 |
| 7351680 | High performance water-based mud system | — | 2008-04-01 |
| 6818596 | Dry mix for water based drilling fluid | — | 2004-11-16 |
| 5344817 | Downhole drilling spotting fluid composition and method | Gale Campbell | 1994-09-06 |
| 5329255 | Thermally compensating microwave cavity | Steve R. Kasten, George J. Purden | 1994-07-12 |
| 5127475 | Downhole drilling spotting fluid composition and method | Gale L. Campbell | 1992-07-07 |
| 5126696 | W-Band waveguide variable controlled oscillator | Albert J. Grote, Paul Johnson | 1992-06-30 |
| 5002672 | Downhole drilling spotting fluid composition and method | Gale Campbell | 1991-03-26 |