Inventor
YAMASHITA KIICHI
JP45 patents
⚠️ This page may combine multiple inventors who share the name “YAMASHITA KIICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
18 patentsUS6495914B1Dec 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
US5305134AApr 19, 1994
Optical frequency division multiplexing transmitter and optical frequency division multiplexing transmission apparatus
HITACHI LTD57 citations96
US4604745AAug 5, 1986
Method of searching fault locations in digital transmission line
HITACHI LTD59 citations96
US6330165B1Dec 11, 2001
Semiconductor device
HITACHI LTD74 citations95
US6492195B2Dec 10, 2002
Method of thinning a semiconductor substrate using a perforated support substrate
HITACHI LTD115 citations94
US6952565B1Oct 4, 2005
Communication terminal, automobile communication terminal, and automobile
HITACHI LTD28 citations92
US6731171B2May 4, 2004
Power amplifier module with stable idling current
HITACHI LTD44 citations92
US6489680B2Dec 3, 2002
Semiconductor device
HITACHI LTD15 citations92
US6461927B1Oct 8, 2002
Semiconductor device and method of producing the same
HITACHI LTD37 citations92
US5166553ANov 24, 1992
Current mirror circuit employing depletion mode FETs
HITACHI LTD26 citations92
US5144467ASep 1, 1992
Optical tuning method and apparatus suitable for selective reception of optical frequency division multiplex signals
HITACHI LTD26 citations92
US6636118B1Oct 21, 2003
High-frequency power amplification module and radio communication device
HITACHI LTD28 citations91
US4390960AJun 28, 1983
Frequency divider
HITACHI LTD21 citations82
US4723312AFeb 2, 1988
Light emitting diode driver circuit
HITACHI LTD24 citations80
US4857769AAug 15, 1989
Threshold voltage fluctuation compensation circuit for FETS
HITACHI LTD13 citations74
US4806803AFeb 21, 1989
Current switching circuit
HITACHI LTD7 citations74
US4968904ANov 6, 1990
MESFET circuit with threshold-compensated source-follower output
HITACHI LTD13 citations73
US4847550AJul 11, 1989
Semiconductor circuit
HITACHI LTD2 citations63
RENESAS TECH CORP
11 patentsUS6775525B1Aug 10, 2004
Radio communication apparatus and semiconductor device
RENESAS TECH CORP28 citations93
US6710649B2Mar 23, 2004
Power amplifier module
RENESAS TECH CORP17 citations93
US6958656B2Oct 25, 2005
Power amplifier module
RENESAS TECH CORP22 citations92
US6816017B2Nov 9, 2004
Power amplifier module
RENESAS TECH CORP29 citations92
US6771128B1Aug 3, 2004
Power amplifier module
RENESAS TECH CORP31 citations92
US6822517B2Nov 23, 2004
Power amplifier module
RENESAS TECH CORP10 citations74
US6696711B2Feb 24, 2004
Semiconductor device and power amplifier using the same
RENESAS TECH CORP10 citations74
US7525813B2Apr 28, 2009
Semiconductor device
RENESAS TECH CORP6 citations73
US7001819B2Feb 21, 2006
Semiconductor device and power amplifier using the same
RENESAS TECH CORP2 citations63
US7078975B2Jul 18, 2006
Power amplifier module
RENESAS TECH CORP0 citations52
US7015761B2Mar 21, 2006
Power amplifier module
RENESAS TECH CORP0 citations52
SUNSTAR ENGINEERING INC
7 patentsUS6337355B1Jan 8, 2002
Two-pack urethane foam composition
SUNSTAR ENGINEERING INC21 citations90
US12589368B2Mar 31, 2026
Gas supply system, mechanical foaming system, and gas supply method
SUNSTAR ENGINEERING INC0 citations52
US12496599B2Dec 16, 2025
Dispenser and nozzle for discharging mixture of gas and paste material and mechanical foaming device
SUNSTAR ENGINEERING INC0 citations52
US11135749B2Oct 5, 2021
Filling apparatus for foamable material and filling method therefor
SUNSTAR ENGINEERING INC0 citations52
US12521747B2Jan 13, 2026
Method for adjusting pressure of mixture of gas and paste material discharged from dispenser
SUNSTAR ENGINEERING INC0 citations49
US11359046B2Jun 14, 2022
Polyurethane composition
SUNSTAR ENGINEERING INC0 citations49
US7943672B2May 17, 2011
Foaming method and apparatus therefor
SUNSTAR ENGINEERING INC1 citations46
HITACHI TOBU SEMICONDUCTOR LTD
2 patentsSUNSTAR SUISSE SA
2 patentsUS7459107B2Dec 2, 2008
Two-pack urethane foam composition, and two-pack urethane foam composition injecting apparatus and method
SUNSTAR SUISSE SA3 citations60
US6866804B2Mar 15, 2005
Two-pack urethane foam composition, and two-pack urethane foam composition injecting apparatus and method
SUNSTAR SUISSE SA1 citations60