Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11015427 | System and method for quantitative cement bond evaluation | Naoki Sakiyama, Hiroaki Yamamoto, Shin'ichi Watanabe | 2021-05-25 |
| 10655462 | Acoustic tool eccentering correction | Naoki Sakiyama | 2020-05-19 |
| 10585202 | Acoustic sensing with azimuthally distributed transmitters and receivers | Naoki Sakiyama, Hiroshi Hori, Toshimichi Wago | 2020-03-10 |
| 10392920 | Method and system of quantitative cement evaluation using logging while drilling | Hiroshi Hori, Vivian Pistre, Toshihiro Kinoshita | 2019-08-27 |
| 10364664 | Downhole acoustic mapping | Hiroshi Hori, Naoki Sakiyama, Toshimichi Wago, Hiroshi Nakajima, Shin'ichi Houshuyama +1 more | 2019-07-30 |
| 8511421 | Acoustic sources | Hitoshi Sugiyama | 2013-08-20 |
| 4295549 | Anti-rust cover for a disc rotor of a vehicle disc brake | Juichi Shibatani, Kenichi Nakamura, Yuichiro Obu | 1981-10-20 |
| 4253552 | Anti-rust cover for a disc rotor of a vehicle disc brake | Juichi Shibatani, Kenichi Nakamura, Yuichiro Obu | 1981-03-03 |