Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5534693 | Optical displacement detection apparatus employing diffraction gratings and a reference position sensor located on the scale | Hiroshi Kondo, Kou Ishizuka, Satoshi Ishii | 1996-07-09 |
| 5483377 | Displacement detection apparatus | Koh Ishizuka, Hiroshi Kondo, Satoshi Ishii | 1996-01-09 |
| 5448358 | Optical apparatus and displacement-information measuring apparatus using the same | Ko Ishizuka, Hiroshi Kondo, Satoshi Ishii | 1995-09-05 |
| 5390022 | Displacement information detection apparatus for receiving a divergent light beam | Koh Ishizuka, Tetsuharu Nishimura, Hiroshi Kondo | 1995-02-14 |
| 5283434 | Displacement detecting device with integral optics | Koh Ishizuka, Tetsuharu Nishimura | 1994-02-01 |