Inventor
NAKAGAWA EIICHI
JP16 patents
⚠️ This page may combine multiple inventors who share the name “NAKAGAWA EIICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI ELECTRIC CORP
8 patentsUS5455704AOct 3, 1995
Optical-fiber light amplifier
MITSUBISHI ELECTRIC CORP43 citations91
US5367587ANov 22, 1994
Optical amplifier
MITSUBISHI ELECTRIC CORP22 citations91
US4989930AFeb 5, 1991
Optoelectronics package
MITSUBISHI ELECTRIC CORP38 citations91
US6714394B1Mar 30, 2004
Electric power feeding line switching method, electric power feeding line switching apparatus and electric power feeding line switching system
MITSUBISHI ELECTRIC CORP21 citations90
US5510930AApr 23, 1996
Light amplifying apparatus
MITSUBISHI ELECTRIC CORP10 citations73
US6934434B1Aug 23, 2005
Circuit for switching optical paths
MITSUBISHI ELECTRIC CORP9 citations71
US6792192B1Sep 14, 2004
Optical variable attenuator
MITSUBISHI ELECTRIC CORP7 citations71
US6563236B2May 13, 2003
Feed line switching circuit and branching unit
MITSUBISHI ELECTRIC CORP1 citations51
TSUBAKIMOTO CHAIN CO
7 patentsUS11808313B2Nov 7, 2023
Cam clutch
TSUBAKIMOTO CHAIN CO1 citations61
US11913503B2Feb 27, 2024
Cam clutch
TSUBAKIMOTO CHAIN CO0 citations59
US11761496B2Sep 19, 2023
Cam clutch
TSUBAKIMOTO CHAIN CO0 citations59
US12442423B2Oct 14, 2025
Cam clutch
TSUBAKIMOTO CHAIN CO0 citations51
US11846329B2Dec 19, 2023
Cam clutch
TSUBAKIMOTO CHAIN CO0 citations48
US12253121B2Mar 18, 2025
Cam clutch
TSUBAKIMOTO CHAIN CO0 citations47
US12305722B2May 20, 2025
Cam clutch
TSUBAKIMOTO CHAIN CO0 citations45