Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832465 | Zoom lens for use in copying | Nobutaka Minefuji | 1989-05-23 |
| 4819035 | Color separation optical reading apparatus | Kazushi Yoshida, Takashi Iizuka | 1989-04-04 |
| 4781449 | Wide angle reading lens system | Jun Hirakawa | 1988-11-01 |
| 4773746 | Reading lens system | — | 1988-09-27 |
| 4735496 | Five-element copying zoom lens system | — | 1988-04-05 |
| 4676632 | Variable magnification copying optical system | — | 1987-06-30 |
| 4618253 | Focal position adjusting device for small variable-magnification type copying machine with zoom lens | — | 1986-10-21 |
| 4597641 | Variable-power copying lens | — | 1986-07-01 |
| 4474462 | Variable magnification type optical copier in which the copying size can be increased or decreased | Ryota Ogawa | 1984-10-02 |
| 4468100 | Wide-angle photographic lens | Takayuki Itoh | 1984-08-28 |
| 4447137 | Large-aperture telephoto lens | — | 1984-05-08 |
| 4420248 | Variable magnification copying device | Ryota Ogawa, Ikuo Negoro, Hisao Iwanade | 1983-12-13 |
| 4408841 | Variable power lens system for copying | Ryota Ogawa | 1983-10-11 |
| 4400080 | Two-drum type copying machine having improved illumination efficiency | Ryota Ogawa, Michiro Oishi | 1983-08-23 |
| 4387979 | Copying optical system | Michiro Ohishi, Ryota Ogawa | 1983-06-14 |
| 4354756 | Copying apparatus | Ryota Ogawa, Michiro Ohishi | 1982-10-19 |
| 4333711 | Zoom lens for copying | Takayuki Itoh, Ryota Ogawa | 1982-06-08 |
| 4322159 | Variable magnification type copying machine | Sataro Takahashi, Ryota Ogawa | 1982-03-30 |
| 4190324 | Achromatic objective lens | — | 1980-02-26 |