P

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 patents
US6806836B2Oct 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 patents
US7453405B2Nov 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 patents

SOVEREIGN PEAK VENTURES LLC

3 patents

YAMAMOTO ATSUSHI

2 patents

SATOU HIROSHI

2 patents

MATSUSHITA ELECTRIC CO LTD

1 patent

CENTRAL INST EXPER ANIMALS

1 patent

SAITOU YUTAKA

1 patent

HIROBE TAKANORI

1 patent

ISHIBANA KYOUKO

1 patent

Showing the top 50 of 78 patents by PatentIndex Score.