KC

Kiyofumi Chikuma

Pioneer Electronic: 45 patents #9 of 1,840Top 1%
Pioneer: 20 patents #42 of 1,730Top 3%
DC Dowa Mining Co.: 2 patents #92 of 324Top 30%
Sumitomo Electric Industries: 2 patents #9,741 of 21,551Top 50%
NI Ngk Insulators: 1 patents #1,271 of 2,083Top 65%
UN Unknown: 1 patents #29,356 of 83,584Top 40%
Overall (All Time): #34,006 of 4,157,543Top 1%
65
Patents All Time

Issued Patents All Time

Showing 51–65 of 65 patents

Patent #TitleCo-InventorsDate
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