Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5767971 | Apparatus for measuring refractive index of medium using light, displacement measuring system using the same apparatus, and direction-of-polarization rotating unit | Hitoshi Kawai, Jun Kawakami, Akira Ishida | 1998-06-16 |
| 5748315 | Optical interference measuring apparatus and method for measuring displacement of an object having an optical path separating system | Hitohsi Kawai, Jun Kawakami | 1998-05-05 |