Inventor
SEKINE KENJI
JP46 patents
⚠️ This page may combine multiple inventors who share the name “SEKINE KENJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
27 patentsUS6384680B1May 7, 2002
RF amplifier with plural combiners
HITACHI LTD93 citations98
US6384688B1May 7, 2002
High-frequency power amplifier module
HITACHI LTD87 citations98
US6495914B1Dec 17, 2002
Multi-chip module structure having conductive blocks to provide electrical connection between conductors on first and second sides of a conductive base substrate
HITACHI LTD399 citations97
US6750707B2Jun 15, 2004
Multi-carrier RF amplifiers
HITACHI LTD70 citations96
US6366788B1Apr 2, 2002
Mobile telephone system
HITACHI LTD75 citations96
US6249242B1Jun 19, 2001
High-frequency transmitter-receiver apparatus for such an application as vehicle-onboard radar system
HITACHI LTD103 citations96
US6330165B1Dec 11, 2001
Semiconductor device
HITACHI LTD74 citations95
US6396349B2May 28, 2002
Traveling wave power combiner and radio base station
HITACHI LTD18 citations93
US4933602AJun 12, 1990
Apparatus for generating light by utilizing microwave
HITACHI LTD35 citations93
US6952565B1Oct 4, 2005
Communication terminal, automobile communication terminal, and automobile
HITACHI LTD28 citations92
US6489680B2Dec 3, 2002
Semiconductor device
HITACHI LTD15 citations92
US6337661B1Jan 8, 2002
High frequency communication device
HITACHI LTD28 citations92
US4346774AAug 31, 1982
Doppler radar mounting structure for motor vehicles
HITACHI LTD51 citations92
US5274341ADec 28, 1993
High-frequency power amplifier
HITACHI LTD84 citations91
US6535069B2Mar 18, 2003
High-frequency power amplifier module
HITACHI LTD13 citations84
US6236272B1May 22, 2001
Traveling wave power combiner and radio base station
HITACHI LTD15 citations84
US4356489AOct 26, 1982
Vehicle speed sensing apparatus with electromagnetic wave interference detector
HITACHI LTD20 citations82
US4259743AMar 31, 1981
Transmit/receive microwave circuit
HITACHI LTD28 citations82
US4251817AFeb 17, 1981
Microwave integrated circuit device for transmission/reception of a signal
HITACHI LTD26 citations81
US4647869AMar 3, 1987
Microwave solid-state amplifier
HITACHI LTD24 citations80
US6862001B2Mar 1, 2005
High frequency communication device
HITACHI LTD6 citations74
US4366546ADec 28, 1982
Signal processor for skid control device
HITACHI LTD14 citations74
US4316173AFeb 16, 1982
Doppler radar vehicle speed sensing system including means for checking system operation based on the detection of low frequency Doppler frequency components
HITACHI LTD18 citations74
US4255730AMar 10, 1981
Microwave integrated circuit device
HITACHI LTD18 citations74
US7519786B2Apr 14, 2009
Storage system, storage access restriction method and computer program product
HITACHI LTD1 citations52
US7225328B2May 29, 2007
Maintenance terminal of disk array device
HITACHI LTD0 citations42
US6046637AApr 4, 2000
Feedforward amplifier
HITACHI LTD0 citations42
RENESAS TECH CORP
8 patentsUS6865399B2Mar 8, 2005
Mobile telephone apparatus
RENESAS TECH CORP93 citations98
US6943624B2Sep 13, 2005
Radio frequency power amplifier
RENESAS TECH CORP61 citations96
US6674323B2Jan 6, 2004
High frequency power amplifier, high frequency power amplifier module, and portable telephone
RENESAS TECH CORP40 citations93
US6816017B2Nov 9, 2004
Power amplifier module
RENESAS TECH CORP29 citations92
US6949974B2Sep 27, 2005
Radio frequency power amplifier
RENESAS TECH CORP12 citations84
US6853243B2Feb 8, 2005
Wireless communication frequency signal amplification apparatus and transmitting and receiving apparatus
RENESAS TECH CORP13 citations84
US7525813B2Apr 28, 2009
Semiconductor device
RENESAS TECH CORP6 citations73
US7123087B2Oct 17, 2006
Radio frequency power amplifier
RENESAS TECH CORP4 citations63