Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5696578 | Frequency tracking method and apparatus, and Doppler velocity meter using the same | Yasuhiko Ishida, Hidejiro Kadowaki, Jun Ashiwa, Shigeki Kato, Shinji Ueda | 1997-12-09 |
| 5640239 | Optical device and displacement information measurement apparatus using the same | Hidejiro Kadowaki | 1997-06-17 |
| 5629793 | Frequency shifter and optical displacement measurement apparatus using the same | Hidejiro Kadowaki | 1997-05-13 |