Inventor
OKAMURA MASAHIRO
JP33 patents
⚠️ This page may combine multiple inventors who share the name “OKAMURA MASAHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
19 patentsUS4745088AMay 17, 1988
Vapor phase growth on semiconductor wafers
HITACHI LTD213 citations98
US4649990AMar 17, 1987
Heat-conducting cooling module
HITACHI LTD75 citations96
US4514747AApr 30, 1985
Field controlled thyristor with double-diffused source region
HITACHI LTD32 citations92
US4223328ASep 16, 1980
Field controlled thyristor with dual resistivity field layer
HITACHI LTD42 citations92
US4083062AApr 4, 1978
Avalanche photodiode with reduced avalanche breakdown voltage
HITACHI LTD35 citations89
US4388635AJun 14, 1983
High breakdown voltage semiconductor device
HITACHI LTD19 citations82
US4016593AApr 5, 1977
Bidirectional photothyristor device
HITACHI LTD28 citations82
US4079405AMar 14, 1978
Semiconductor photodetector
HITACHI LTD26 citations79
US4354121AOct 12, 1982
Field controlled thyristor control circuit with additional FCT in reverse bias circuit
HITACHI LTD10 citations74
US4216487AAug 5, 1980
Bidirectional light-activated thyristor having substrate optical isolation
HITACHI LTD12 citations74
US4110781AAug 29, 1978
Bidirectional grooved thyristor fired by activation of the beveled surfaces
HITACHI LTD13 citations74
US4040084AAug 2, 1977
Semiconductor device having high blocking voltage with peripheral circular groove
HITACHI LTD16 citations74
US4491562AJan 1, 1985
Thermal fatigue resistant low-melting point solder alloys
HITACHI LTD8 citations72
US4210464AJul 1, 1980
Method of simultaneously controlling the lifetimes and leakage currents in semiconductor devices by hot electron irradiation through passivating glass layers
HITACHI LTD14 citations72
US4201598AMay 6, 1980
Electron irradiation process of glass passivated semiconductor devices for improved reverse characteristics
HITACHI LTD14 citations72
US3968019AJul 6, 1976
Method of manufacturing low power loss semiconductor device
HITACHI LTD11 citations71
US4682199AJul 21, 1987
High voltage thyristor with optimized doping, thickness, and sheet resistivity for cathode base layer
HITACHI LTD6 citations63
US4258377AMar 24, 1981
Lateral field controlled thyristor
HITACHI LTD4 citations63
US3943550AMar 9, 1976
Light-activated semiconductor-controlled rectifier
HITACHI LTD2 citations63
PIONEER CORP
7 patentsUS6813508B1Nov 2, 2004
Apparatus and method for mobile communication
PIONEER CORP38 citations92
US6546258B1Apr 8, 2003
Communication apparatus and communication method
PIONEER CORP19 citations92
US6980814B2Dec 27, 2005
Mobile communication system with mobile station position detection
PIONEER CORP15 citations84
US6701468B1Mar 2, 2004
Code error correcting circuit, code error correcting method, communicating apparatus and communicating method
PIONEER CORP7 citations74
US7046698B1May 16, 2006
Communicating apparatus and communicating method
PIONEER CORP2 citations62
US7043440B2May 9, 2006
Play back apparatus
PIONEER CORP6 citations62
US6731675B2May 4, 2004
Receiving device for spread spectrum communication system
PIONEER CORP5 citations62