Issued Patents All Time
Showing 51–65 of 65 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5138686 | Fiber type wavelength converter | Sota Okamoto | 1992-08-11 |
| 5119458 | Fibre-type wavelength converison device | Sota Okamoto, Takafumi Uemiya | 1992-06-02 |
| 5119384 | Optical wavelength converter and method of manufacturing the same | — | 1992-06-02 |
| 5112122 | Fiber-type light conversion device | Sota Okamoto | 1992-05-12 |
| 5072437 | Optical information reproducing apparatus | — | 1991-12-10 |
| 5063556 | Optical information recording medium providing reflected light at two different wavelengths, recording apparatus utilizing the same | — | 1991-11-05 |
| 5061038 | Fiber type wavelength converter | Sota Okamoto | 1991-10-29 |
| 5052772 | Fiber type light wave-length converting apparatus | Sota Okamoto | 1991-10-01 |
| 5022738 | Optical fiber nonlinear wavelength modulator device | Naota Uenishi, Takafumi Uemiya, Akira Mizoguchi, Yasuji Ogaki, Yasuhiro Hattori +2 more | 1991-06-11 |
| 4981337 | Fibre-type light wavelength coversion device | Sota Okamoto | 1991-01-01 |
| 4962993 | Fibre-type light conversion device | Sota Okamoto | 1990-10-16 |
| 4927681 | Optical information recording medium providing reflected light at two different wavelengths | — | 1990-05-22 |
| 4909587 | Fibre-type light conversion device | Sota Okamoto | 1990-03-20 |
| 4892375 | Fiber-type light conversion device | Sota Okamoto | 1990-01-09 |
| 4671623 | Aspheric object lens for optical data read-out apparatus | — | 1987-06-09 |