Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7894297 | Methods and apparatus for borehole sensing including downhole tension sensing | Tsutomu Yamate, Masahiro Kamata | 2011-02-22 |
| 7696901 | Methods and apparatus for photonic power conversion downhole | Colin Wilson, Soon Seong Chee, Tsutomu Yamate, Masahiro Kamata | 2010-04-13 |
| 7187620 | Method and apparatus for borehole sensing | Tsutomu Yamate, Masahiro Kamata | 2007-03-06 |