Matsui; Keiji
Patent Applications and Registrations
Patent applications and USPTO patent grants for Matsui; Keiji.The latest application filed is for "optical encoder diffraction gratings for eliminating diffracted light components".
- Matsui; Keiji - Niwa-gun JP
- Matsui; Keiji - Niwa JP
- Matsui; Keiji - Aichi JP
- Matsui; Keiji - Ooguchi JP
| Patent | Date |
|---|---|
| Optical encoder diffraction gratings for eliminating diffracted light components Grant 5,801,378 - Hane , et al. September 1, 1 | 1998-09-01 |
| Optical position-detecting apparatus Grant 5,249,032 - Matsui , et al. September 28, 1 | 1993-09-28 |
| Parallel light ray measuring apparatus Grant 5,170,221 - Matsui , et al. December 8, 1 | 1992-12-08 |
| Optical encoder Grant 5,068,530 - Ieki , et al. November 26, 1 | 1991-11-26 |
| Optical linear encoder Grant 4,979,827 - Matsui December 25, 1 | 1990-12-25 |
| Optical encoder with varying grating pitch Grant 4,956,553 - Matsui September 11, 1 | 1990-09-11 |
| High resolution optical encoder having a long detection stroke Grant 4,950,891 - Matsui August 21, 1 | 1990-08-21 |
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