FN

Fumihiro Nakajima

Sumitomo Electric Industries: 10 patents #2,734 of 21,551Top 15%
SI Sumitomo Electric Device Innovations: 3 patents #44 of 208Top 25%
Pioneer Electronic: 2 patents #804 of 1,840Top 45%
Overall (All Time): #400,432 of 4,157,543Top 10%
12
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12429657 Optical device and manufacturing method for optical device Kazushige Oki, Kazunobu Kobayashi, Hiroshi Hara, Eiji Tsumura, Masanobu Kawamura +4 more 2025-09-30
10826622 Wavelength de-multiplexing system and optical receiver module Kazuaki Mii, Hiroshi Hara 2020-11-03
10707970 Wavelength de-multiplexing system and optical receiver module Kazuaki Mii, Hiroshi Hara 2020-07-07
10281653 Optical receiver module and process to assemble optical receiver module Masanobu Kawamura, Kazushige Oki, Hiroshi Hara, Yasushi Fujimura, Kazunori Tanaka +1 more 2019-05-07
10128974 Optical receiver module and process to assemble optical receiver module Masanobu Kawamura, Hiroshi Hara, Michio Suzuki, Yasushi Fujimura, Kazushige Oki 2018-11-13
9768872 Optical transceiver outputting wavelength multiplexed signal and receiving another wavelength multiplexed signal Shinta Kasai, Masaaki Ono 2017-09-19
9614636 Receiver optical module for wavelength multiplexed signal 2017-04-04
9363021 Receiver optical module including optical de-multiplexer, lenses, and photodiodes vertically arranged to each other within housing Yasushi Fujimura 2016-06-07
9197345 Receiver optical module for receiving wavelength multiplexed optical signals and method to assemble the same Hiroshi Hara, Yasushi Fujimura, Kazushige Oki 2015-11-24
8475058 Optical module with ceramic package reducing optical coupling stress Yasushi Fujimura, Toshio Takagi 2013-07-02
5195075 Output level controlling apparatus Takahumi Shiba, Hirokazu Inotani, Seiichi Hasebe 1993-03-16
4761692 Method and apparatus for data recording disc playback Masayuki Yoshida, Izumi Ueda, Hidehiro Ishii, Takahumi Shiba 1988-08-02