AK

Atsushi Kitagawa

Rohm Co.: 13 patents #214 of 2,292Top 10%
ND Nitto Denko: 7 patents #475 of 2,479Top 20%
PA Panasonic: 5 patents #5,165 of 21,108Top 25%
JP Japan Styrene Paper: 1 patents #30 of 56Top 55%
SE Seiko Epson: 1 patents #5,551 of 7,774Top 75%
Overall (All Time): #154,476 of 4,157,543Top 4%
26
Patents All Time

Issued Patents All Time

Showing 1–25 of 26 patents

Patent #TitleCo-InventorsDate
10483966 Switching circuit Takahiro UEHARA, Takuya Ishii, Hiroyuki Handa, Takeshi Tanaka 2019-11-19
10205449 Switching circuit Takahiro UEHARA, Takuya Ishii, Hiroyuki Handa, Takeshi Tanaka 2019-02-12
10033275 DC-DC converter with a switching transistor arranged in an area where an inductor overlaps a substrate Takuya Ishii, Tadata Hatanaka 2018-07-24
9812964 Semiconductor device and power supply unit utilizing the same 2017-11-07
9391038 Semiconductor device and power supply unit utilizing the same 2016-07-12
8872577 Semiconductor device and power supply unit utilizing the same 2014-10-28
8704357 Semiconductor device and power supply unit utilizing the same 2014-04-22
8659514 LED matrix driver ghost image prevention apparatus and method Etsuji Sato, Yoshihito Kawakami, Chun Kiong Leslie Khoo, Ulysses Ramos Lopez, Narciso Repollo Semira +1 more 2014-02-25
8305011 Driving circuit for light emitting elements Kunihiro Komiya 2012-11-06
8063494 Semiconductor device and power supply unit utilizing the same 2011-11-22
7893667 PWM power supply apparatus having a controlled duty ratio without causing overall system oscillation Hiroaki Asazu 2011-02-22
7586297 Soft start circuit, power supply unit and electric equipment 2009-09-08
7518892 Semiconductor integrated circuit including charge pump and electronic device including the semiconductor integrated circuit Hiroshi Sawada 2009-04-14
7405549 Soft start circuit, power supply unit and electric equipment 2008-07-29
7277264 Semiconductor integrated circuit having current detection functionality and power supply unit equipped with the same 2007-10-02
7271862 Light diffusing sheet, optical element and image display Takuya Matsunaga, Takashi Shouda 2007-09-18
7218496 Overcurrent protection circuit 2007-05-15
7157866 Light emitting element driving device and portable apparatus equipped with light emitting elements Kunihiro Komiya 2007-01-02
7119863 Electro-optical device and electronic apparatus Takumi Seki 2006-10-10
7037573 Antireflection film, its production method, optical device, and image display Minoru Miyatake, Masahiro Yoshioka, Tomoaki Masuda, Hiroyuki Takao, Kaori Shirouzu 2006-05-02
6888592 Liquid crystal display wide viewing angle polarizing film and liquid crystal display wide viewing angle polarizing adhesive film Akira Ootani, Hisashi Mihara 2005-05-03
6882385 Polarizing plate having protective films with plasticizer, liquid crystal display using the same, and methods of making the same Seiichi Kusumoto, Hisashi Mihara, Eiji Hamamoto 2005-04-19
6847419 Polarizing plate and liquid crystal display using the same Seiichi Kusumoto, Hisashi Mihara, Eiji Hamamoto 2005-01-25
6741307 Optical diffusion sheet, optical element, and viewing display Takuya Matsunaga, Seiji Kondo, Takashi Shouda 2004-05-25
6404469 Wide viewing angle polarizing plate and liquid crystal display Yuuji Saiki, Masayuki Satake, Hiroyuki Yoshimi 2002-06-11