Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5067089 | Device having signal interpolation circuit and displacement measuring apparatus comprising the device | Satoshi Ishii, Masaaki Tsukiji, Tetsuharu Nishimura | 1991-11-19 |
| 5066130 | Displacement measuring apparatus | Masaaki Tsukiji, Tetsuharu Nishimura, Satoshi Ishii, Yoichi Kubota | 1991-11-19 |
| 5059791 | Reference position detecting device utilizing a plurality of photo-detectors and an encoder using the device | Tetsuharu Nishimura, Osamu Kasahara | 1991-10-22 |
| 5051579 | Optical scale encoder with light intensity alarm | Masaaki Tsukiji, Tetsuharu Nishimura, Satoshi Ishii | 1991-09-24 |
| 5038491 | Scale for use for measurement of the displacement of an object to be examined, and displacement measuring apparatus | Masaaki Tsukiji, Tetsuharu Nishimura, Satoshi Ishii | 1991-08-13 |
| 5038032 | Encoder incorporating a displaceable diffraction grating | Tetsuharu Nishimura, Yoichi Kubota, Satoshi Ishii, Masaaki Tsukiji | 1991-08-06 |
| 5036192 | Rotary encoder using reflected light | Tetsuharu Nishimura, Osamu Kasahara | 1991-07-30 |
| 5026985 | Method and apparatus for detecting a reference position of a rotating scale with two sensors | Tetsuharu Nishimura, Masaaki Tsukiji, Satoshi Ishii | 1991-06-25 |
| 5021649 | Relief diffraction grating encoder | Tetsuharu Nishimura, Satoshi Ishii, Masaaki Tsukiji | 1991-06-04 |
| 5017777 | Diffracted beam encoder | Masaaki Tsukiji, Yoichi Kubota, Satoshi Ishii, Tetsuharu Nishimura | 1991-05-21 |
| 5000542 | Optical type encoder | Tetsuharu Nishimura, Masaaki Tsukiji, Satoshi Ishii, Yoichi Kubota | 1991-03-19 |
| 4998798 | Encoder having long length measuring stroke | Tetsuharu Nishimura, Satoshi Ishii, Yoichi Kubota, Masaaki Tsukiji | 1991-03-12 |
| 4979826 | Displacement measuring apparatus | Tetsuharu Nishimura, Masaaki Tsukiji, Satoshi Ishii, Yoichi Kubota | 1990-12-25 |
| 4975570 | Rotary encoder using multiple diffracted beams having co-incident paths | Tetsuharu Nishimura, Masaaki Tsukiji, Satoshi Ishii, Yoichi Kubota | 1990-12-04 |
| 4970388 | Encoder with diffraction grating and multiply diffracted light | Tetsuharu Nishimura, Satoshi Ishii, Yoichi Kubota, Masaaki Tsukiji | 1990-11-13 |
| 4933673 | Encoder | Tetsuharu Nishimura, Masaaki Tsukiji, Satoshi Ishii | 1990-06-12 |
| 4930895 | Encoder for forming interference fringes by re-diffracted lights from an optical type scale and photoelectrically converting the interference fringes to thereby detect the displacement of the scale | Tetsuharu Nishimura, Masaaki Tsukiji, Satoshi Ishii | 1990-06-05 |
| 4912320 | Optical type encoder including diffraction grating for producing interference fringes that are processed to measure displacement | Satoshi Ishii, Tetsuharu Nishimura, Masaaki Tsukiji | 1990-03-27 |