Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4293199 | Apparatus for detecting astigmatic axes and measuring refractive powers | Ikuo Kitao, Yoshinori Oana, Yasuo Kato, Taketoshi Ishihara | 1981-10-06 |
| 4277150 | Eye refractmeter | Ikuo Kitao, Yasuo Kato, Taketoshi Ishihara | 1981-07-07 |