Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
KT

Ken Takei — 74 Patents

Hitachi: 60 patents #166 of 28,497Top 1%
HCHitachi Cable: 14 patents #22 of 1,086Top 3%
HDHitachi Displays: 3 patents #305 of 752Top 45%
Panasonic: 3 patents #7,617 of 21,108Top 40%
HCHitachi Media Electronics Co.: 2 patents #79 of 214Top 40%
Ibaraki, JP: #31 of 6,779 inventorsTop 1%
Overall (All Time): #26,479 of 4,157,543Top 1%
74 Patents All Time

Issued Patents All Time

Showing 26–50 of 74 patents

Patent #TitleCo-InventorsDate
8334619 Frequency variable power transmitter and receiver in Fresnel region and power transmitting system 2012-12-18
8248311 Planar array antenna and communication terminal and wireless module using the same 2012-08-21
8233105 Image display device Hiroshi Kageyama, Futoshi Furuta 2012-07-31
8184252 Image display device Futoshi Furuta, Hiroshi Kageyama 2012-05-22
8073415 Tunable receiving apparatus and method therefor Takahiro Sugiyama 2011-12-06
7917093 Wireless monitoring system and child station therefor 2011-03-29
7902986 RFID tag 2011-03-08
7817094 Antenna, and wireless module, wireless unit and wireless apparatus having the antenna Satoshi Adachi, Makoto Katagishi, Ikuo Murata, Masumi Iwamura, Takahiro Sugiyama +1 more 2010-10-19
7791542 Skeleton equalizing antenna, RFID tag and RFID system using the same 2010-09-07
7755545 Antenna and method of manufacturing the same, and portable wireless terminal using the same Tomoyuki Ogawa, Morihiko Ikegaya, Keisuke Fukuchi 2010-07-13
7714787 Antenna, and wireless module, wireless unit and wireless apparatus having the antenna Satoshi Adachi, Makoto Katagishi, Ikuo Murata, Masumi Iwamura, Takahiro Sugiyama +1 more 2010-05-11
7663550 Distributed phase type circular polarized wave antenna and high-frequency module using the same Tomoyuki Ogawa 2010-02-16
7633444 Distributed phase type circular polarized receiving module and portable radio communication device Tomoyuki Ogawa 2009-12-15
7602346 Antenna module, radio device and mobile radio terminal Takahiro Sugiyama, Yohei Shirakawa 2009-10-13
7586443 Leakage loss line type circularly-polarized wave antenna and high-frequency module 2009-09-08
7541979 Small size thin type antenna, multilayered substrate, high frequency module, and radio terminal mounting them Tomoyuki Ogawa, Morihiko Ikegaya 2009-06-02
7486238 Circular polarized wave antenna and method for designing same Tomoyuki Ogawa 2009-02-03
7460068 Distributed phase type circular polarized wave antenna, high-frequency module using the same, and portable radio communication terminal using the same Tomoyuki Ogawa 2008-12-02
7394426 Circular polarized antenna, antenna design simulator, and wireless module with the antenna Tomoyuki Ogawa 2008-07-01
7336239 Small multi-mode antenna and RF module using the same 2008-02-26
7157050 System and method for detecting biological and chemical material Yoshiaki Yazawa, Masao Kamahori, Hideki Kambara, Mitsuo Usami 2007-01-02
7015862 Antenna, method for manufacturing the antenna, and communication apparatus including the antenna Hiroyuki Aoyama 2006-03-21
6952565 Communication terminal, automobile communication terminal, and automobile Eriko Takeda, Kiichi Yamashita, Kenji Sekine 2005-10-04
6937200 Antenna and wireless apparatus 2005-08-30
6879845 Wireless communication method and system using beam direction-variable antenna Toshiro Suzuki, Satoshi Takahashi, Hiroshi Usami, Yuuji Ishida 2005-04-12