Inventor
KAWAI MOTOYOSHI
JP15 patents
⚠️ This page may combine multiple inventors who share the name “KAWAI MOTOYOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
13 patentsUS6453091B2Sep 17, 2002
Optical system unit for optical transceiver
NEC CORP24 citations91
US6184560B1Feb 6, 2001
Photosemiconductor device mounted structure
NEC CORP18 citations82
US10349153B2Jul 9, 2019
Optical multiplexing and demultiplexing device, and method of controlling optical multiplexing and demultiplexing device
NEC CORP2 citations71
US6967980B2Nov 22, 2005
Optical semiconductor module
NEC CORP6 citations61
US12574111B2Mar 10, 2026
Light control device, method for controlling light control device, and recording medium
NEC CORP0 citations50
US12463725B2Nov 4, 2025
Optical add/drop multiplexer and optical transmission method
NEC CORP0 citations50
US12451962B2Oct 21, 2025
Monitoring signal light output apparatus, submarine apparatus, and optical communication system
NEC CORP0 citations50
US11936422B2Mar 19, 2024
Spectrum monitoring apparatus, submarine apparatus, and optical communication system
NEC CORP0 citations50
US11405110B2Aug 2, 2022
Optical repeater and optical signal relay method
NEC CORP0 citations50
US9496676B2Nov 15, 2016
Optical amplifier and control method thereof
NEC CORP0 citations50
US6597484B1Jul 22, 2003
Two-way combination optical system unit
NEC CORP0 citations50
US10200117B2Feb 5, 2019
Optical communication device, optical communication system, and optical communication method
NEC CORP0 citations40
US9444219B2Sep 13, 2016
Repeater, excitation light supply device used for the same, and excitation light supply method
NEC CORP0 citations40