Issued Patents All Time
Showing 1–25 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6617572 | Displacement information detection apparatus | — | 2003-09-09 |
| 6229140 | Displacement information detection apparatus | — | 2001-05-08 |
| 5680211 | Apparatus for optically detecting displacement of an object using a synthesizing means utilizing a substrate with two diffraction gratings thereon | Yasushi Kaneda, Hiroshi Kondo, Satoshi Ishii | 1997-10-21 |
| 5661296 | Rotary encoder measuring substantially coinciding phases of interference light components | Yasushi Kaneda | 1997-08-26 |
| 5657125 | Apparatus including a light-detecting element having a photo-electric conversion surface and an integral light blocking member | Shigeki Kato, Hiroshi Kondo, Satoshi Ishii, Yasushi Kaneda | 1997-08-12 |
| 5621527 | Apparatus for measuring relative displacement between the apparatus and a scale which a grating is formed | Yasushi Kaneda | 1997-04-15 |
| 5574559 | Displacement detection apparatus using multiple displacement detection signals formed by a multiple phase combination grating | Yasushi Kaneda, Hiroshi Kondo, Satoshi Ishii | 1996-11-12 |
| 5569913 | Optical displacement sensor | Yasushi Kaneda | 1996-10-29 |
| 5568337 | Head positioning using a disk drive mounted to a rotating table | Tadashi Eguchi, Katsumi Momose, Hiroji Narumi, Tetsuharu Nishimura, Kotaro Hosaka +1 more | 1996-10-22 |
| 5557396 | Velocity information detecting apparatus | Satoshi Ishii, Yasushi Kaneda | 1996-09-17 |
| 5537210 | Rotation detecting apparatus and scale having a multi helix diffraction grating for the same | Yasushi Kaneda, Satoshi Ishii, Kenji Hisamoto | 1996-07-16 |
| 5532819 | Rotary detector having an optical system for guiding two diffracted lights | Tetsuharu Nishimura | 1996-07-02 |
| 5498870 | Rotation information detection apparatus | — | 1996-03-12 |
| 5483377 | Displacement detection apparatus | Yasushi Kaneda, Hiroshi Kondo, Satoshi Ishii | 1996-01-09 |
| 5438586 | Apparatus with light-emitting element and method for producing it | Satoshi Ishii, Tetsuharu Nishimura, Hiroshi Kondo | 1995-08-01 |
| 5436724 | Apparatus for measuring relative movement using a diffraction grating having an orthogonally polarized input beam | Tetsuharu Nishimura | 1995-07-25 |
| 5404220 | Measuring method and measuring apparatus for determining the relative displacement of a diffraction grating with respect to a plurality of beams | Seiji Takeuchi, Tetsuharu Nishimura, Minoru Yoshii, Hiroyasu Nose | 1995-04-04 |
| 5390022 | Displacement information detection apparatus for receiving a divergent light beam | Tetsuharu Nishimura, Hiroshi Kondo, Yasushi Kaneda | 1995-02-14 |
| 5302821 | Encoder using a birefringent element and a system including the same | Masahiko Igaki, Masaru Nyui | 1994-04-12 |
| 5283434 | Displacement detecting device with integral optics | Tetsuharu Nishimura, Yasushi Kaneda | 1994-02-01 |
| 5159192 | Encoder and scanning system using a scale having a non-uniform pitch | Tetsuharu Nishimura | 1992-10-27 |
| 5146085 | Encoder with high resolving power and accuracy | Tetsuharu Nishimura | 1992-09-08 |
| 5129725 | Method of optically detecting position of object and position detecting apparatus using the method | Tetsuharu Nishimura, Masaaki Tsukiji, Chikara Satoh, Satoshi Ishii | 1992-07-14 |
| 5126562 | Encoder for setting optical path lengths of related beams | Tetsuharu Nishimura | 1992-06-30 |
| 5101102 | Rotary encoder having a plurality of beams emitted by a diffraction grating | Tetsuharu Nishimura | 1992-03-31 |