Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6610441 | Annular pack | Donald E. Hensley, Stuart Schaaf, Fraser M. Walsh | 2003-08-26 |
| 6547010 | Annular pack having mutually engageable annular segments | Donald E. Hensley, Stuart Schaaf, Fraser M. Walsh | 2003-04-15 |
| 6280874 | Annular pack | Donald E. Hensley, Stuart Schaaf, Fraser M. Walsh | 2001-08-28 |
| 6045941 | Method to determine the state of charge and remaining life of lithium batteries used in oilfield services applications | — | 2000-04-04 |
| 5303872 | Transportable battery disposal unit | Baldemar Fuentes, Dinesh R. Patel | 1994-04-19 |
| 4792756 | Method and apparatus for measuring axially extending defects in ferromagnetic elements | Clive Lam, James E. Bradfield | 1988-12-20 |
| 4710712 | Method and apparatus for measuring defects in ferromagnetic elements | James E. Bradfield, John E. Kahil, Mark S. Jaynes, Gordon L. Moake, Curtis W. Bolton, III +2 more | 1987-12-01 |
| 4698590 | Method and apparatus for measuring velocity of ferromagnetic tubing | Gordon L. Moake | 1987-10-06 |
| 4636727 | Method and apparatus for detecting the location of defects in tubular sections moving past a well head | John E. Kahil, James E. Bradfield, Clive Lam | 1987-01-13 |
| 4611170 | Coil apparatus mounted on an axially split spool for indicating wall thickness variations of a length of ferromagnetic pipe | Roderic K. Stanley, Robert C. Knauer, Jr., James E. Bradfield | 1986-09-09 |
| 4578642 | Method and apparatus for measuring velocity of ferromagnetic tubing | Gordon L. Moake | 1986-03-25 |
| 4555665 | Magnetic flux method for measuring tubular wall thickness | Roderic K. Stanley, Robert C. Knauer, Jr., James E. Bradfield | 1985-11-26 |