Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6999179 | Optical encoder | — | 2006-02-14 |
| 6831267 | Optical encoder | — | 2004-12-14 |
| 6631047 | Interference device, position detecting device, positioning device and information recording apparatus using the same | Hidejiro Kadowaki, Naoki Kawamata, Hiroyuki Hagiwara, Makoto Takamiya, Shigeki Kato +1 more | 2003-10-07 |
| 6259531 | Displacement information measuring apparatus with hyperbolic diffraction grating | Makoto Takamiya, Hidejiro Kadowaki, Yasushi Kaneda | 2001-07-10 |
| 6151185 | Position detecting apparatus, positioning apparatus, and information recording apparatus using the same | Hidejiro Kadowaki, Makoto Takamiya | 2000-11-21 |
| 6005667 | Optical displacement measurement apparatus and information recording apparatus | Makoto Takamiya | 1999-12-21 |
| 5956140 | Displacement detection apparatus and drive control apparatus using the same constructed to prevent collision between gratings | Takayuki Kadoshima | 1999-09-21 |
| 5930066 | Information recording apparatus | Hidejiro Kadowaki, Naoki Kawamata, Hiroyuki Hagiwara, Jun Ashiwa | 1999-07-27 |
| 5917182 | Rotation detector and controller for detecting rotation information using a grating interference system | — | 1999-06-29 |
| 5883384 | Rotational displacement information detection apparatus | Shigeki Kato | 1999-03-16 |
| 5880839 | Optical displacement measuring apparatus including a light-emitting element and an adjacent ball lens | Yasushi Kaneda | 1999-03-09 |
| 5742391 | Optical type sensor for use as an optical measuring head or optical pickup | Yasushi Kaneda, Kenji Hisamoto | 1998-04-21 |
| 5663794 | Displacement information detection apparatus, scale used in the apparatus, and drive apparatus using the apparatus | — | 1997-09-02 |
| 5534693 | Optical displacement detection apparatus employing diffraction gratings and a reference position sensor located on the scale | Hiroshi Kondo, Satoshi Ishii, Yasushi Kaneda | 1996-07-09 |
| 5067813 | Optical apparatus for measuring displacement of an object | Tetsuharu Nishimura, Masaaki Tsukiji, Satoshi Ishii | 1991-11-26 |