| 6646742 |
Optical device and method for multi-angle laser light scatter |
Mervin L. Gangstead, Wieland E. von Behrens, James R. Boyd, Jean Charles Pina |
2003-11-11 |
| 6507400 |
Optical system for multi-part differential particle discrimination and an apparatus using the same |
Jean Charles Pina, Wieland E. von Behrens, Mervin L. Gangstead, James R. Boyd |
2003-01-14 |
| 5589633 |
Method and apparatus for measuring pumping rod position and other aspects of a pumping system by use of an accelerometer |
James N. McCoy, Augusto L. Podio |
1996-12-31 |
| 5406482 |
Method and apparatus for measuring pumping rod position and other aspects of a pumping system by use of an accelerometer |
James N. McCoy, Augusto L. Podio |
1995-04-11 |
| 4656397 |
Method and apparatus for controlling flash tube discharge |
George D. Chappell, Robert B. Wilson |
1987-04-07 |
| 4293815 |
Fluxgate magnetometer circuit with earth's field elimination |
John L. Kretzschnar, Bing-Fai Fung |
1981-10-06 |
| 4227404 |
Digital mineral logging system |
— |
1980-10-14 |
| 4227405 |
Digital mineral logging system |
— |
1980-10-14 |