Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878078 | Focus detecting device and method of making same | Takeshi Koyama, Keiji Ohtaka | 1989-10-31 |
| 4859842 | Multi-directional focus state detection apparatus | Ichiro Ohnuki, Akira Akashi, Akira Ishizaki, Keiji Ohtaka, Takeshi Koyama | 1989-08-22 |
| 4855777 | Apparatus for detecting the focus adjusted state of an objective lens | Masaki Higashihara, Terutake Kadohara | 1989-08-08 |
| 4833313 | Focus detecting apparatus having increased SNR by selectively varying or holding constant the number of signals from sensor arrays | Akira Akashi, Akira Ishizaki, Ichiro Ohnuki, Keiji Ohtaka, Takeshi Koyama | 1989-05-23 |
| 4825239 | Distance detection method and apparatus | Akira Akashi, Akira Ishizaki, Hiroshi Ohmura, Keiji Ohtaka | 1989-04-25 |
| 4812869 | Focus detecting apparatus | Akira Akashi, Akira Ishizaki, Ichiro Ohnuki, Keiji Ohtaka, Takeshi Koyama | 1989-03-14 |
| 4800410 | Focus detecting apparatus for selecting the operating process in conformity with the contrast of an object | Akira Akashi, Akira Ishizaki, Ichiro Ohnuki, Keiji Ohtaka, Takeshi Koyama | 1989-01-24 |