Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6002639 | Sensor configuration for nulling reverberations to image behind reflective layers | James R. Birchak, Batakrishna Mandal, James Masino, John W. Minear | 1999-12-14 |
| 5995447 | System and method for processing acoustic signals to image behind reflective layers | Batakrishna Mandal, James R. Birchak, James Masino, John W. Minear | 1999-11-30 |
| 5841734 | Rotating acoustic transducer head for cement bond evaluation tool | James R. Birchak, James W. Stroud, Mack H. Brown, James Masino, John W. Minear | 1998-11-24 |
| 5740126 | Turbo siren signal generator for measurement while drilling systems | Wilson C. Chin | 1998-04-14 |
| 5636178 | Fluid driven siren pressure pulse generator for MWD and flow measurement systems | — | 1997-06-03 |
| 5586083 | Turbo siren signal generator for measurement while drilling systems | Wilson C. Chin | 1996-12-17 |
| 5344337 | Electrical connector with rubber boot seal | — | 1994-09-06 |
| 5203723 | Low cost plastic hermetic electrical connectors for high pressure application | — | 1993-04-20 |
| 4577410 | Method and apparatus for providing accurate wireline depth measurements | — | 1986-03-25 |