Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12217994 | Electrostatic chuck device and sleeve for electrostatic chuck device | — | 2025-02-04 |
| 6498478 | Azimuth measuring method, azimuth measuring apparatus, position measuring method, and position measuring apparatus | Fumio Sakata, Shinichi Endo, Koji Watanabe | 2002-12-24 |
| 5565860 | Underground information collecting apparatus having a noise cancel function | Fumio Sakata | 1996-10-15 |
| 5540085 | Method of measuring leakage position in impervious bottom sheet using electrodes mounted on both surfaces of the sheet and apparatus therefor | Fumio Sakata, Masaichiro Hatano, Hitoshi Arai, Ken-ichi Arai, Masanobu Furukawa | 1996-07-30 |
| 4800385 | Well data transmission system using a magnetic drill string for transmitting data as a magnetic flux signal | — | 1989-01-24 |