Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11773718 | Formation fluid sampling methods and systems | Lizheng Zhang, Nestor Javier Rodriguez, William Wade Samec, Burkay Donderici | 2023-10-03 |
| 11422079 | Viscosity sensor | Li Gao | 2022-08-23 |
| 10876398 | Fluid viscometer suitable for downhole use | Li Gao, Michael T. Pelletier | 2020-12-29 |
| 10324015 | Viscosity sensor | Li Gao | 2019-06-18 |
| 10066991 | Optical processing of multiple spectral ranges using integrated computational elements | Michael T. Pelletier, William Soltmann, Raj Pai, Christopher Michael Jones, David L. Perkins +2 more | 2018-09-04 |
| 9798039 | Frequency based measurement of characteristics of a substance | Michael T. Pelletier, William Soltmann, David L. Perkins, Raj Pai | 2017-10-24 |
| 7750808 | Data retrieval tags | Li Gao, Chris Golla, Paul F. Rodney | 2010-07-06 |
| 7447051 | Synchronous multi-phase AC-to-DC converter | Roger L. Schultz | 2008-11-04 |
| 7363971 | Method and apparatus for maintaining a multi-chip module at a temperature above downhole temperature | Paul F. Rodney, Roger L. Schultz | 2008-04-29 |
| 7301223 | High temperature electronic devices | Paul F. Rodney, Christopher Golla, Roger L. Schultz, James Joseph Freeman | 2007-11-27 |
| 7268019 | Method and apparatus for high temperature operation of electronics | Christopher Golla, Roger L. Schultz | 2007-09-11 |
| 7239098 | Digital adaptive sensorless commutational drive controller for a brushless DC motor | — | 2007-07-03 |
| 7230552 | Temperature compensation apparatus, systems, and methods | Roger L. Schultz | 2007-06-12 |
| 7030582 | Digital adaptive sensorless commutational drive controller for a brushless DC motor | — | 2006-04-18 |
| 6912904 | Single tube densitometer | Bruce H. Storm, Jr., Mark A. Proett, Michael T. Pelletier | 2005-07-05 |
| 6901212 | Digital adaptive sensorless commutational drive controller for a brushless DC motor | — | 2005-05-31 |
| 6688176 | Single tube densitometer | Bruce H. Storm, Jr., Mark A. Proett, Michael T. Pelletier | 2004-02-10 |
| 6543544 | Low power miniature hydraulic actuator | Roger L. Schultz, Brock Watson, Robert Michael | 2003-04-08 |
| 6125079 | System and method for providing dual distance transducers to image behind an acoustically reflective layer | James R. Birchak, Batakrishna Mandal, John W. Minear, Thomas Ritter | 2000-09-26 |
| 6102152 | Dipole/monopole acoustic transmitter, methods for making and using same in down hole tools | Batakrishna Mandal, James R. Birchak, John W. Minear, Thomas Ritter | 2000-08-15 |
| 6021093 | Transducer configuration having a multiple viewing position feature | James R. Birchak, Batakrishna Mandal, John W. Minear, Thomas Ritter | 2000-02-01 |
| 6002639 | Sensor configuration for nulling reverberations to image behind reflective layers | James R. Birchak, Batakrishna Mandal, John W. Minear, Thomas Ritter | 1999-12-14 |
| 5995447 | System and method for processing acoustic signals to image behind reflective layers | Batakrishna Mandal, James R. Birchak, John W. Minear, Thomas Ritter | 1999-11-30 |
| 5841734 | Rotating acoustic transducer head for cement bond evaluation tool | Thomas Ritter, James R. Birchak, James W. Stroud, Mack H. Brown, John W. Minear | 1998-11-24 |