Issued Patents All Time
Showing 1–25 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12345547 | System and method of directional sensor calibration | James-Christian F. Ang, Lee Jacobo Jose Roitberg | 2025-07-01 |
| 12119536 | Electromagnetic tool using slotted point dipole antennas | — | 2024-10-15 |
| 11682821 | Electromagnetic tool using slotted point dipole antennas | — | 2023-06-20 |
| 11619518 | System and method of directional sensor calibration | James-Christian F. Ang, Lee Jacobo Jose Roitberg | 2023-04-04 |
| 11616284 | Electromagnetic tool using slotted point dipole antennas | — | 2023-03-28 |
| 11539300 | DC to DC power converter device capable of either bidirectional step-up conversion or bidirectional step-down conversion, and control method thereof | Stone Peng, Juor-Ming Hsieh | 2022-12-27 |
| 10866116 | System and method of directional sensor calibration | James-Christian F. Ang, Lee Jacobo Jose Roitberg | 2020-12-15 |
| 10345091 | Apparatus and method for magnetic sensor based surface shape analysis | Bertrand F. Cambou, Ljubisa Ristic, Douglas J. Lee, Ted Stokes, Ken Mackay | 2019-07-09 |
| 9885800 | Steerable magnetic dipole antenna for measurement while drilling applications | Macmillan M. Wisler, Larry W. Thompson, Lance Pate | 2018-02-06 |
| 9863785 | System and method of directional sensor calibration | James-Christian F. Ang, Lee Jacobo Jose Roitberg | 2018-01-09 |
| 9366780 | Steerable magnetic dipole antenna for measurement while drilling applications | Macmillan M. Wisler, Larry W. Thompson, Lance Pate | 2016-06-14 |
| 9250100 | System and method of directional sensor calibration | James-Christian F. Ang, Lee Jacobo Jose Roitberg | 2016-02-02 |
| 9140817 | Steerable magnetic dipole antenna for measurement-while-drilling applications | Macmillan M. Wisler, Larry W. Thompson, Lance Pate | 2015-09-22 |
| 8604796 | Steerable magnetic dipole antenna for measurement-while-drilling applications | Macmillan M. Wisler, Larry W. Thompson, Lance Pate | 2013-12-10 |
| 8471563 | Steerable magnetic dipole antenna for measurement while drilling applications | Macmillan M. Wisler, Larry W. Thompson, Lance Pate | 2013-06-25 |
| 8378908 | Array antenna for measurement-while-drilling | Macmillan M. Wisler, Larry W. Thompson, Michael Shaun Spencer | 2013-02-19 |
| 8217597 | Drive circuit for a capacitive load | Chi Ping Sun, Hai Bo JIANG, Jian Han | 2012-07-10 |
| 7353613 | Directional sensor system comprising a single axis sensor element positioned at multiple controlled orientations | Roger P. Bartel | 2008-04-08 |
| 6966211 | Downhole calibration system for directional sensors | — | 2005-11-22 |
| 6646441 | Well logging system for determining resistivity using multiple transmitter-receiver groups operating at three frequencies | Larry W. Thompson, MacMillian M. Wisler | 2003-11-11 |
| 6601671 | Method and apparatus for seismically surveying an earth formation in relation to a borehole | Xiaomin Zhao, Francis X. Bostick, III, Daniel L. Gysling, Peter C. Ogle, Allen R. Davis +2 more | 2003-08-05 |
| 6585061 | Calculating directional drilling tool face offsets | Paul Radzinski, Michael L. Larronde | 2003-07-01 |
| 6577129 | Well logging system for determining directional resistivity using multiple transmitter-receiver groups focused with magnetic reluctance material | Larry W. Thompson, MacMillian M. Wisler | 2003-06-10 |
| 6385545 | Method and apparatus for determining dip angle and horizontal and vertical conductivities | — | 2002-05-07 |
| 6305227 | Sensing systems using quartz sensors and fiber optics | Kevin Didden, Alan D. Kersey, Phillip E. Pruett, Arthur D. Hay | 2001-10-23 |