Inventor
KOYANAGI YOSHIO
JP78 patents
⚠️ This page may combine multiple inventors who share the name “KOYANAGI YOSHIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
18 patentsUS6806836B2Oct 19, 2004
Helical antenna apparatus provided with two helical antenna elements, and radio communication apparatus provided with same helical antenna apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD86 citations98
US6211830B1Apr 3, 2001
Radio antenna device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD100 citations96
US6697025B2Feb 24, 2004
Antenna apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD55 citations94
US6731920B1May 4, 2004
Portable telephone apparatus and control method thereof
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD42 citations93
US5940040AAug 17, 1999
System for selecting between a whip antenna and a built-in antenna
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD45 citations93
US7212164B2May 1, 2007
Radio terminal device antenna and radio terminal device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD21 citations92
US7268564B2Sep 11, 2007
Apparatus for measuring specific absorption rate of radio communication apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD24 citations91
US6919845B2Jul 19, 2005
Apparatus for measuring specific absorption rate based on near magnetic field for use in radio apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD39 citations91
US6459412B1Oct 1, 2002
Antenna unit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD20 citations89
US7062245B2Jun 13, 2006
Radio transmission apparatus and radio reception apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations84
US7436364B2Oct 14, 2008
Mobile radio apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD10 citations83
US6147651ANov 14, 2000
Antenna system
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations83
US6590538B1Jul 8, 2003
Antenna apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations81
US7324047B2Jan 29, 2008
Adaptive antenna apparatus for selecting adaptive control processing according to detected signal quality and radio communication apparatus using the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74
US6919861B2Jul 19, 2005
Array antenna apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations74
US6611504B1Aug 26, 2003
Mobile wireless device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations74
US7439918B2Oct 21, 2008
Adaptive antenna apparatus including adaptive controller for adaptive controlling at least two antenna elements
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD5 citations63
US7315728B2Jan 1, 2008
Polarized wave measuring apparatus, and antenna characteristic measuring apparatus and radio wave measuring apparatus using the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD5 citations63
PANASONIC CORP
13 patentsUS7453405B2Nov 18, 2008
Portable wireless device
PANASONIC CORP86 citations97
US9607757B2Mar 28, 2017
Non-contact wireless communication coil, transmission coil, and portable wireless terminal
PANASONIC CORP27 citations94
US7502592B2Mar 10, 2009
Adaptive antenna apparatus provided with controller for controlling to select best demodulated signal
PANASONIC CORP25 citations93
US9634515B2Apr 25, 2017
Non-contact wireless communication coil, transmission coil, and portable wireless terminal
PANASONIC CORP10 citations84
US7589687B2Sep 15, 2009
Antenna apparatus provided with antenna element excited through multiple feeding points
PANASONIC CORP13 citations84
US7843394B2Nov 30, 2010
Radio antenna unit and mobile radio device equipped with the same
PANASONIC CORP8 citations83
US7821463B2Oct 26, 2010
Mobile telephone with broadcast receiving element
PANASONIC CORP10 citations83
US7777688B2Aug 17, 2010
Polarization switching antenna device
PANASONIC CORP13 citations83
US7671818B2Mar 2, 2010
Antenna device with integrated connection cable, and radio apparatus
PANASONIC CORP10 citations83
US7532168B2May 12, 2009
Folding portable wireless unit
PANASONIC CORP16 citations82
US10204734B2Feb 12, 2019
Electronic device including non-contact charging module and near field communication antenna
PANASONIC CORP4 citations73
US9941048B2Apr 10, 2018
Non-contact wireless communication coil, transmission coil, and portable wireless terminal
PANASONIC CORP3 citations73
US7616161B2Nov 10, 2009
Portable wireless apparatus
PANASONIC CORP3 citations63
PANASONIC IP MAN CO LTD
7 patentsUS9667086B2May 30, 2017
Mobile terminal
PANASONIC IP MAN CO LTD13 citations92
US10230272B2Mar 12, 2019
Mobile terminal including wireless charging coil and magnetic sheet having inwardly receding portion
PANASONIC IP MAN CO LTD5 citations84
US9735606B2Aug 15, 2017
Mobile terminal including charging coil and wireless communication coil, wireless charging module including charging coil and wireless communication coil
PANASONIC IP MAN CO LTD15 citations84
US10549652B2Feb 4, 2020
Power transmission device
PANASONIC IP MAN CO LTD3 citations73
US10447053B2Oct 15, 2019
Terminal
PANASONIC IP MAN CO LTD5 citations73
US10276916B2Apr 30, 2019
Antenna device
PANASONIC IP MAN CO LTD6 citations73
US10886621B2Jan 5, 2021
Antenna device
PANASONIC IP MAN CO LTD6 citations70
SOVEREIGN PEAK VENTURES LLC
3 patentsUS10574090B2Feb 25, 2020
Mobile terminal including wireless charging coil and magnetic sheet having inwardly receding portion
SOVEREIGN PEAK VENTURES LLC4 citations84
US10291069B2May 14, 2019
Mobile terminal and chargeable communication module
SOVEREIGN PEAK VENTURES LLC4 citations84
US11075547B2Jul 27, 2021
Cell phone having wireless charging function
SOVEREIGN PEAK VENTURES LLC2 citations73
YAMAMOTO ATSUSHI
2 patentsSATOU HIROSHI
2 patentsMATSUSHITA ELECTRIC CO LTD
1 patentCENTRAL INST EXPER ANIMALS
1 patentSAITOU YUTAKA
1 patentHIROBE TAKANORI
1 patentISHIBANA KYOUKO
1 patentShowing the top 50 of 78 patents by PatentIndex Score.