Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10982530 | Apparatus, system and method of a magnetically shielded wellbore gyroscope | Sogo Kuroiwa, Shigeru Sato, Akira Kamiya | 2021-04-20 |
| 10458226 | Shock and vibration damper system and methodology | Sogo Kuroiwa, Tsuyoshi Yanase | 2019-10-29 |
| 9435649 | Method and system for azimuth measurements using a gyroscope unit | Shigeru Sato | 2016-09-06 |
| 8200436 | Method and apparatus for wellbore survey using inertial sensors | Shigeru Sato, Tsutomu Yamate, Charles Woodburn | 2012-06-12 |
| 8136406 | Pressure transducer with piezoelectric crystal for harsh environment use | Shigeru Sato | 2012-03-20 |
| 8061048 | Apparatus for azimuth measurements using gyro sensors | Tsunehiko Imamura, Akira Kamiya, Shigeru Sato, Tsutomu Yamate | 2011-11-22 |
| 8061047 | Active positioning of downhole devices using spherical motors | Brian Cho, Hideyuki Kamei, Hitoshi Sugiyama, Paolo Primiero, Hitoshi Tashiro | 2011-11-22 |
| 7801704 | Method and system for azimuth measurements using gyro sensors | Shigeru Sato, Akira Kamiya, Tsutomu Yamate | 2010-09-21 |
| 7720323 | High-temperature downhole devices | Tsutomu Yamate, Soon Seong Chee, Stephane Vannuffelen, Colin Wilson, Khalid Ouaaba +1 more | 2010-05-18 |
| 7712223 | Apparatus for azimuth measurements using gyro sensors | Tsunehiko Imamura, Akira Kamiya, Shigeru Sato, Tsutomu Yamate | 2010-05-11 |
| 7413011 | Optical fiber system and method for wellhole sensing of magnetic permeability using diffraction effect of faraday rotator | Soon Seong Chee, Remy Parmentier, Xu Wu, Colin Wilson | 2008-08-19 |
| 6170601 | Borehole seismic tool | Hiroshi Nakajima, Akira Kamiya | 2001-01-09 |