Inventor · disambiguated record
Atsushi Kitagawa
Also filed as: KITAGAWA ATSUSHI
26 granted patents·4 pending applications·344 citations·filing 1986–2018
96Inventor score
Top patents by PatentIndex Score
30 records- 0194US7157866B2Light emitting element driving device and portable apparatus equipped with light emitting elementsROHM CO LTD·Filed 2005·Granted Jan 2, 2007·40 cites·17 claims
- 0291US6741307B2Optical diffusion sheet, optical element, and viewing displayNITTO DENKO CORP·Filed 2002·Granted May 25, 2004·47 cites·11 claims
- 0389US7218496B2Overcurrent protection circuitROHM CO LTD·Filed 2005·Granted May 15, 2007·18 cites·9 claims
- 0489US6404469B1Wide viewing angle polarizing plate and liquid crystal displayNITTO DENKO CORP·Filed 2001·Granted Jun 11, 2002·38 cites·10 claims
- 0586US7518892B2Semiconductor integrated circuit including charge pump and electronic device including the semiconductor integrated circuitROHM CO LTD·Filed 2007·Granted Apr 14, 2009·24 cites·2 claims
- 0685US7037573B2Antireflection film, its production method, optical device, and image displayNITTO DENKO CORP·Filed 2003·Granted May 2, 2006·36 cites·17 claims
- 0784US8063494B2Semiconductor device and power supply unit utilizing the sameKITAGAWA ATSUSHI·Filed 2005·Granted Nov 22, 2011·10 cites·5 claims
- 0882US7271862B2Light diffusing sheet, optical element and image displayNITTO DENKO CORP·Filed 2003·Granted Sep 18, 2007·26 cites·14 claims
- 0980US7277264B2Semiconductor integrated circuit having current detection functionality and power supply unit equipped with the sameROHM CO LTD·Filed 2005·Granted Oct 2, 2007·9 cites·14 claims
- 1077US7405549B2Soft start circuit, power supply unit and electric equipmentROHM CO LTD·Filed 2006·Granted Jul 29, 2008·13 cites·14 claims
- 1175US8305011B2Driving circuit for light emitting elementsKITAGAWA ATSUSHI·Filed 2008·Granted Nov 6, 2012·6 cites·9 claims
- 1275US7586297B2Soft start circuit, power supply unit and electric equipmentROHM CO LTD·Filed 2008·Granted Sep 8, 2009·10 cites·10 claims
- 1373US8659514B2LED matrix driver ghost image prevention apparatus and methodSATO ETSUJI·Filed 2011·Granted Feb 25, 2014·5 cites·14 claims
- 1472US4695593APrefoamed propylene polymer-base particles, expansion-molded article produced from said particles and production process of said articleJAPANE STYRENE PAPER CORP·Filed 1986·Granted Sep 22, 1987·29 cites·4 claims
- 1571US10033275B2DC-DC converter with a switching transistor arranged in an area where an inductor overlaps a substratePANASONIC IP MAN CO LTD·Filed 2016·Granted Jul 24, 2018·2 cites·6 claims
- 1669US6888592B2Liquid crystal display wide viewing angle polarizing film and liquid crystal display wide viewing angle polarizing adhesive filmNITTO DENKO CORP·Filed 2002·Granted May 3, 2005·12 cites·13 claims
- 1768US10483966B2Switching circuitPANASONIC IP MAN CO LTD·Filed 2018·Granted Nov 19, 2019·1 cites·8 claims
- 1864US6882385B2Polarizing plate having protective films with plasticizer, liquid crystal display using the same, and methods of making the sameNITTO DENKO CORP·Filed 2003·Granted Apr 19, 2005·7 cites·8 claims
- 1961US7119863B2Electro-optical device and electronic apparatusSEIKO EPSON CORP·Filed 2003·Granted Oct 10, 2006·6 cites·3 claims
- 2058US9391038B2Semiconductor device and power supply unit utilizing the sameROHM CO LTD·Filed 2014·Granted Jul 12, 2016·0 cites·8 claims
- 2157US8872577B2Semiconductor device and power supply unit utilizing the sameROHM CO LTD·Filed 2014·Granted Oct 28, 2014·0 cites·8 claims
- 2256US9812964B2Semiconductor device and power supply unit utilizing the sameROHM CO LTD·Filed 2016·Granted Nov 7, 2017·0 cites·8 claims
- 2351US8704357B2Semiconductor device and power supply unit utilizing the sameKITAGAWA ATSUSHI·Filed 2011·Granted Apr 22, 2014·0 cites·20 claims
- 2450US10205449B2Switching circuitPANASONIC IP MAN CO LTD·Filed 2018·Granted Feb 12, 2019·0 cites·7 claims
- 2550US7893667B2PWM power supply apparatus having a controlled duty ratio without causing overall system oscillationROHM CO LTD·Filed 2006·Granted Feb 22, 2011·4 cites·11 claims
- 2644US6847419B2Polarizing plate and liquid crystal display using the sameNITTO DENKO CORP·Filed 2002·Granted Jan 25, 2005·1 cites·18 claims
- 2744US2009176575A1Game server system, game element providing method, game device, and program productKONAMI DIGITAL ENTERTAINMENT·Filed 2005·Application pending·0 cites
- 2840US2004105054A1Electro-optical device and electronic apparatusSEIKO EPSON CORP·Filed 2003·Application pending·0 cites
- 2938US2004239825A1Liquid crystal device, active matrix substrate, display device, and electronic equipmentSEIKO EPSON CORP·Filed 2004·Application pending·0 cites
- 3036US2007216379A1Power supply unit and portable deviceROHM CO LTD·Filed 2005·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Atsushi Kitagawa files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →