Issued Patents All Time
Showing 26–50 of 61 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5515208 | Endoscope objective lens | Chikara Yamamoto | 1996-05-07 |
| 5491588 | Afocal zooming optical system | Hiroyuki Kato | 1996-02-13 |
| 5442413 | Pupil conjugate-coupling device in projecting optical system | Yasuyuki Tejima, Yasunori Izawa, Nobutaka Minefuji | 1995-08-15 |
| 5381197 | Reflecting illumination projecting device | Kazushi Yoshida | 1995-01-10 |
| 5373437 | Device for and method of reducing cross talk in optical disk device | Tsuyoshi Itoh, Isao Okuda, Hiroshi Nishikawa, Toshiyuki Kase, Masahiro Oono +2 more | 1994-12-13 |
| 5295020 | Lens assembling structure | Takashi Iizuka | 1994-03-15 |
| 5293188 | Reflecting illumination type projecting device | Kazushi Yoshida, Tetsuya Abe | 1994-03-08 |
| 5280464 | Optical disk apparatus having a focusing error correcting system | Tsuyoshi Itoh, Isao Okuda, Toshiyuki Kase, Hiroshi Nishikawa, Masahiro Oono +2 more | 1994-01-18 |
| 5231433 | Reflecting illumination projecting device | Kazushi Yoshida | 1993-07-27 |
| 5192961 | Reflecting illumination type projecting device | Kazushi Yoshida, Tetsuya Abe | 1993-03-09 |
| 5140467 | Zooming monocular or binoculars | Keiichi Hotta, Hiroyuki Kato | 1992-08-18 |
| 5005968 | Contrast decreasing apparatus in image forming optical system | Yasuyuki Tejima, Makoto Sato | 1991-04-09 |
| 4998191 | Illuminating optical device | Yasuyuki Tejima | 1991-03-05 |
| 4979808 | Endoscope objective lens system | Masakazu Yamagata | 1990-12-25 |
| 4936657 | Projection type liquid-crystal video display device using a fresnel lens | Yasuyuki Tejima | 1990-06-26 |
| 4890133 | Autofocus camera | Shigeo Toji, Kazushi Yoshida, Zenichi Okura | 1989-12-26 |
| 4808806 | Optical system for use in focus detecting apparatus | Osamu Shindo | 1989-02-28 |
| 4660940 | Small-sized wide-angle lens | Shigetada Sato | 1987-04-28 |
| 4508434 | Bright medium-range telephoto lens | — | 1985-04-02 |
| 4498759 | Continuous variable magnification-type copying machine capable of enlarging and contracting an image | Ikuo Negoro | 1985-02-12 |
| 4474462 | Variable magnification type optical copier in which the copying size can be increased or decreased | Yasunori Arai | 1984-10-02 |
| 4420248 | Variable magnification copying device | Ikuo Negoro, Hisao Iwanade, Yasunori Arai | 1983-12-13 |
| 4408841 | Variable power lens system for copying | Yasunori Arai | 1983-10-11 |
| 4400080 | Two-drum type copying machine having improved illumination efficiency | Michiro Oishi, Yasunori Arai | 1983-08-23 |
| 4387979 | Copying optical system | Michiro Ohishi, Yasunori Arai | 1983-06-14 |