Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878078 | Focus detecting device and method of making same | Takeshi Koyama, Yasuo Suda | 1989-10-31 |
| 4859842 | Multi-directional focus state detection apparatus | Yasuo Suda, Ichiro Ohnuki, Akira Akashi, Akira Ishizaki, Takeshi Koyama | 1989-08-22 |
| 4849782 | Focus detecting device | Takeshi Koyama | 1989-07-18 |
| 4841326 | Apparatus for detecting the focus adjusted state of an objective optical system | Takeshi Koyama | 1989-06-20 |
| 4833313 | Focus detecting apparatus having increased SNR by selectively varying or holding constant the number of signals from sensor arrays | Akira Akashi, Akira Ishizaki, Yasuo Suda, Ichiro Ohnuki, Takeshi Koyama | 1989-05-23 |
| 4825239 | Distance detection method and apparatus | Yasuo Suda, Akira Akashi, Akira Ishizaki, Hiroshi Ohmura | 1989-04-25 |
| 4812869 | Focus detecting apparatus | Akira Akashi, Akira Ishizaki, Yasuo Suda, Ichiro Ohnuki, Takeshi Koyama | 1989-03-14 |
| 4801963 | Focus detecting system | Takeshi Koyama | 1989-01-31 |
| 4800410 | Focus detecting apparatus for selecting the operating process in conformity with the contrast of an object | Akira Akashi, Akira Ishizaki, Yasuo Suda, Ichiro Ohnuki, Takeshi Koyama | 1989-01-24 |