Inventor
KUMAGAI YOSHIAKI
JP48 patents
⚠️ This page may combine multiple inventors who share the name “KUMAGAI YOSHIAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
29 patentsUS5926230AJul 20, 1999
Electrical program guide system and method
SONY CORP423 citations99
US5903314AMay 11, 1999
Electrical program guide system and method
SONY CORP228 citations99
US5845260ADec 1, 1998
System and method for parent-controlled charging for on-line services
SONY CORP431 citations99
US4755978AJul 5, 1988
Disc player
SONY CORP153 citations97
USD517023SMar 14, 2006
Combined remote controller and laser pointer
SONY CORP19 citations93
USD385562SOct 28, 1997
Media unit
SONY CORP19 citations93
USD331059SNov 17, 1992
Headphone
SONY CORP26 citations93
USD494167SAug 10, 2004
Portable information terminal
SONY CORP27 citations92
USD494166SAug 10, 2004
Portable information terminal
SONY CORP20 citations92
USD431270SSep 26, 2000
Toy
SONY CORP29 citations92
USD413885SSep 14, 1999
Combined wireless telephone and keyboard
SONY CORP24 citations88
USD745517SDec 15, 2015
Head mountable display
SONY CORP13 citations84
USD597533SAug 4, 2009
Remote controller
SONY CORP9 citations84
USD597520SAug 4, 2009
Combined disc player, clock and radio receiver
SONY CORP10 citations83
USD452889SJan 8, 2002
Toy
SONY CORP13 citations82
USD496036SSep 14, 2004
Portable information terminal
SONY CORP9 citations74
USD435035SDec 12, 2000
Speaker box
SONY CORP9 citations74
USD388095SDec 23, 1997
Media unit
SONY CORP15 citations74
USD368473SApr 2, 1996
Communication device
SONY CORP9 citations74
USD279472SJul 2, 1985
Television projector
SONY CORP6 citations74
USD609691SFeb 9, 2010
Combined disc player, clock and radio receiver
SONY CORP5 citations73
USD412166SJul 20, 1999
Television receiver
SONY CORP5 citations63
USD595687SJul 7, 2009
Combined disc player, clock and radio receiver
SONY CORP5 citations62
USD595688SJul 7, 2009
Combined disc player, clock and radio receiver
SONY CORP3 citations62
USD452541SDec 25, 2001
Toy
SONY CORP1 citations62
USD452542SDec 25, 2001
Toy
SONY CORP1 citations62
US7336289B2Feb 26, 2008
Projection type display apparatus
SONY CORP3 citations60
USD675599SFeb 5, 2013
Earphone
SONY CORP1 citations52
US7597457B2Oct 6, 2009
Lighting apparatus
SONY CORP1 citations52
FUJITSU LTD
10 patentsUS6125138ASep 26, 2000
Base station transmitter-receiver
FUJITSU LTD37 citations93
US5937336AAug 10, 1999
Transmission/reception apparatus
FUJITSU LTD28 citations93
US5768694AJun 16, 1998
Automatic gain control circuit with input and output signal detectors operating in equalized conditions
FUJITSU LTD30 citations93
US5548811AAug 20, 1996
Automatic frequency control circuit selectively using frequency-divided local oscillator signal or pilot signal
FUJITSU LTD22 citations92
US5257415AOct 26, 1993
Automatic transmission level control device
FUJITSU LTD45 citations92
US6728264B1Apr 27, 2004
Radio base station for a CDMA mobile communication system
FUJITSU LTD13 citations83
US5963587AOct 5, 1999
Wideband transceiver
FUJITSU LTD11 citations74
US5410729AApr 25, 1995
Signal transmission device having an automatic transmission level control circuit used in a multi-carrier transmission terminal equipment and multi-carrier transmission terminal equipment employing the transmission device
FUJITSU LTD16 citations74
US5235292AAug 10, 1993
Signal generator having backup oscillator switching circuit
FUJITSU LTD14 citations73
US4968951ANov 6, 1990
Phase locked loop having circuit for recovering from oscillation stoppage
FUJITSU LTD1 citations52
KUMAGAI YOSHIAKI
7 patentsUSD665346SAug 14, 2012
Battery charger
KUMAGAI YOSHIAKI87 citations97
USD656489SMar 27, 2012
Earphone
KUMAGAI YOSHIAKI24 citations92
USD695738SDec 17, 2013
Head mountable display
KUMAGAI YOSHIAKI14 citations84
USD665768SAug 21, 2012
Portable recorder
KUMAGAI YOSHIAKI6 citations84
USD649955SDec 6, 2011
Portable recorder
KUMAGAI YOSHIAKI10 citations84
USD695739SDec 17, 2013
Head mountable display
KUMAGAI YOSHIAKI10 citations83
USD686269SJul 16, 2013
Projector
KUMAGAI YOSHIAKI3 citations63