Issued Patents All Time
Showing 51–59 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5278401 | Optical disc apparatus having five light receiving areas for detecting focus error and tracking error | Suguru Takishima, Isao Okuda, Koichi Maruyama, Masato Noguchi | 1994-01-11 |
| 5276497 | Measuring apparatus of mirror surface | — | 1994-01-04 |
| 5237457 | Apparatus for adjusting an optical axis including a laser beam source and a beam shaping prism | Koichi Maruyama, Makoto Iki, Hitoshi Kimura, Masahiko Sasaki | 1993-08-17 |
| 5223970 | Optical axis adjusting mechanism and method for optical information recording and reproducing device, and jig therefor | Tsuyoshi Itoh, Masahiko Sasaki, Hiroshi Yamamoto, Katsuki Hayashi | 1993-06-29 |
| 5223983 | Compound prism including interfaces with curvatures of the order of a laser wave length | Koichi Maruyama, Masato Noguchi, Makoto Iki, Hitoshi Kimura, Masahiko Sasaki | 1993-06-29 |
| 5218425 | Measuring method and apparatus of roof surface | — | 1993-06-08 |
| 5157459 | Wave front aberration measuring apparatus | Tsuyoshi Itoh, Katsuki Hayashi, Toshiyuki Kase, Masahiko Sasaki, Hiroshi Yamamoto +1 more | 1992-10-20 |
| 5151752 | Method of measuring refractive indices of lens and sample liquid | Tohru Chiba | 1992-09-29 |
| 4886362 | Appratus for measuring the profile of an aspherical surface | — | 1989-12-12 |