Inventor
YAGYU EIJI
JP45 patents
⚠️ This page may combine multiple inventors who share the name “YAGYU EIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI ELECTRIC CORP
35 patentsUS7187013B2Mar 6, 2007
Avalanche photodiode
MITSUBISHI ELECTRIC CORP16 citations92
US7462889B2Dec 9, 2008
Avalanche photodiode
MITSUBISHI ELECTRIC CORP17 citations84
US7259408B2Aug 21, 2007
Avalanche photodiode
MITSUBISHI ELECTRIC CORP13 citations84
US7038251B2May 2, 2006
Semiconductor device
MITSUBISHI ELECTRIC CORP8 citations73
US11482464B2Oct 25, 2022
Semiconductor device including a diamond substrate and method of manufacturing the semiconductor device
MITSUBISHI ELECTRIC CORP2 citations72
US10534239B2Jan 14, 2020
Optical modulator
MITSUBISHI ELECTRIC CORP3 citations71
US11107685B2Aug 31, 2021
Semiconductor manufacturing method and semiconductor manufacturing device
MITSUBISHI ELECTRIC CORP4 citations70
US8351029B2Jan 8, 2013
Optical fiber sensor
MITSUBISHI ELECTRIC CORP6 citations70
US9735878B2Aug 15, 2017
Optical transmitter and control method of optical transmitter
MITSUBISHI ELECTRIC CORP4 citations69
US7928472B2Apr 19, 2011
Optical semiconductor device with a distributed Bragg reflector layer
MITSUBISHI ELECTRIC CORP5 citations63
US7719028B2May 18, 2010
Semiconductor light-receiving device and manufacturing method thereof
MITSUBISHI ELECTRIC CORP3 citations63
US7538367B2May 26, 2009
Avalanche photodiode
MITSUBISHI ELECTRIC CORP3 citations63
US12519030B2Jan 6, 2026
Semiconductor device including diamond substrate and semiconductor device manufacturing method
MITSUBISHI ELECTRIC CORP0 citations62
US7345325B2Mar 18, 2008
Avalanche photodiode
MITSUBISHI ELECTRIC CORP4 citations62
US5255218AOct 19, 1993
Optical frequency multiple signal processing method
MITSUBISHI ELECTRIC CORP6 citations62
US7859662B2Dec 28, 2010
On-vehicle fuel property detection device
MITSUBISHI ELECTRIC CORP3 citations61
US12512648B2Dec 30, 2025
Semiconductor device and method of manufacturing semiconductor device
MITSUBISHI ELECTRIC CORP0 citations60
US12550389B2Feb 10, 2026
Semiconductor device and method of manufacturing semiconductor device
MITSUBISHI ELECTRIC CORP0 citations52
US9915849B2Mar 13, 2018
Optical modulator
MITSUBISHI ELECTRIC CORP1 citations52
US7910953B2Mar 22, 2011
Optical semiconductor device
MITSUBISHI ELECTRIC CORP1 citations52
US5316813AMay 31, 1994
Optical recording medium
MITSUBISHI ELECTRIC CORP0 citations51
US12494404B2Dec 9, 2025
Semiconductor device including stop islands and method for manufacturing semiconductor device
MITSUBISHI ELECTRIC CORP0 citations50
US12426336B2Sep 23, 2025
Semiconductor device, and method of manufacturing semiconductor device
MITSUBISHI ELECTRIC CORP0 citations50
US12387934B2Aug 12, 2025
Method of manufacturing semiconductor element
MITSUBISHI ELECTRIC CORP0 citations50
US12269107B2Apr 8, 2025
Method for manufacturing composite substrate, and composite substrate
MITSUBISHI ELECTRIC CORP0 citations50
US11961765B2Apr 16, 2024
Method for manufacturing a semiconductor substrate and device by bonding an epitaxial substrate to a first support substrate, forming a first and second protective thin film layer, and exposing and bonding a nitride semiconductor layer to a second support substrate
MITSUBISHI ELECTRIC CORP0 citations49
US11854856B2Dec 26, 2023
Method of manufacturing semiconductor element
MITSUBISHI ELECTRIC CORP0 citations49
US8987125B2Mar 24, 2015
Method for manufacturing semiconductor device
MITSUBISHI ELECTRIC CORP1 citations49
US12476165B2Nov 18, 2025
Nitride semiconductor device, and method of manufacturing nitride semiconductor device
MITSUBISHI ELECTRIC CORP0 citations48
US9893210B2Feb 13, 2018
Semiconductor device and method of manufacturing the same
MITSUBISHI ELECTRIC CORP0 citations48
US12557348B2Feb 17, 2026
Semiconductor device
MITSUBISHI ELECTRIC CORP0 citations47
US12349390B2Jul 1, 2025
Semiconductor device
MITSUBISHI ELECTRIC CORP0 citations47
US9733497B2Aug 15, 2017
Semiconductor optical modulator and optical module
MITSUBISHI ELECTRIC CORP0 citations42
US10200130B2Feb 5, 2019
Optical transmitter
MITSUBISHI ELECTRIC CORP0 citations41
US10690989B2Jun 23, 2020
Optical modulation device and method for controlling optical modulation device
MITSUBISHI ELECTRIC CORP0 citations39
MITSUBISHI ELECTRIC RES LABORATORIES INC
3 patentsUS10120132B2Nov 6, 2018
Photonic integrated circuit
MITSUBISHI ELECTRIC RES LABORATORIES INC4 citations73
US9557485B2Jan 31, 2017
System and method for manipulating polarizations of optical signal
MITSUBISHI ELECTRIC RES LABORATORIES INC2 citations70
US10996400B2May 4, 2021
Optical waveguide interferometer
MITSUBISHI ELECTRIC RES LABORATORIES INC0 citations51