Maruyama; Yohji

Patent Applications and Registrations

Patent applications and USPTO patent grants for Maruyama; Yohji.The latest application filed is for "magnetic head having a short yoke with a tapered coil structure".

Company Profile

1.47.33

Maruyama; Yohji - Iruma JP
Maruyama; Yohji - Saitama JP
Maruyama; Yohji - Iruma-shi JP
Maruyama; Yohji - Saitama-ken JP
Maruyama; Yohji - Irumi-shi JP

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
STO bias control for MAMR head reliability Grant 9,672,846 - Tanaka , et al. June 6, 2	2017-06-06
Microwave-assisted recording head with stable oscillation Grant 9,330,687 - Watanabe , et al. May 3, 2	2016-05-03
Magnetic recording head with non-magnetic bump structure formed on spin torque oscillator Grant 9,230,573 - Etoh , et al. January 5, 2	2016-01-05
Perpendicular magnetic write head having a controlled magnetization state shield Grant 9,230,566 - Iwakura , et al. January 5, 2	2016-01-05
Microwave assisted magnetic recording (MAMR) write head and system Grant 9,142,227 - Etoh , et al. September 22, 2	2015-09-22
Dual magnetic sensor for multi-input magnetic recording Grant 9,099,127 - Shintani , et al. August 4, 2	2015-08-04
Magnetic head having a short yoke with a tapered coil structure Grant 9,076,462 - Etoh , et al. July 7, 2	2015-07-07
Magnetic Head Having A Short Yoke With A Tapered Coil Structure App 20150154987 - Etoh; Kimitoshi ; et al.	2015-06-04
Microwave- Assisted Recording Head With Stable Oscillation App 20150103437 - Watanabe; Katsuro ; et al.	2015-04-16
Head-slider including thin-film magnetic-recording head having reduced thermal protrusion Grant 8,786,986 - Fujita , et al. July 22, 2	2014-07-22
Low permeability material for a side shield in a perpendicular magnetic head Grant 8,570,683 - Takahashi , et al. October 29, 2	2013-10-29
Perpendicular magnetic recording head having a non-magnetic film recessed from the air bearing surface for improved high-density magnetic recording Grant 8,542,462 - Maruyama , et al. September 24, 2	2013-09-24
Magnetic head for perpendicular recording Grant 8,537,493 - Kudo , et al. September 17, 2	2013-09-17
Noise and particle shield for contact sensor in a slider Grant 8,477,455 - Furukawa , et al. July 2, 2	2013-07-02
Magnetic head having a facing electrode pair for generating an electromagnetic field and applying energy to the magnetic recording layer Grant 8,373,940 - Maruyama , et al. February 12, 2	2013-02-12
Perpendicular magnetic recording head having a main pole and first and second magnetic films peripheral to the main pole and having different depths from an air bearing surface Grant 8,351,156 - Kudo , et al. January 8, 2	2013-01-08
Low Permeability Material For A Side Shield In A Perpendicular Magnetic Head App 20120327531 - Takahashi; Yusuke ; et al.	2012-12-27
Magnetic head having write pole, first soft magnetic films separately disposed on both sides of the main pole, and a second soft magnetic film disposed on a trailing side of the main pole Grant 8,300,358 - Maruyama , et al. October 30, 2	2012-10-30
Head-gimbal assembly including a transmission-line structure for high-density magnetic recording Grant 8,248,732 - Nishiyama , et al. August 21, 2	2012-08-21
Magnetic head having an asymmetrical shape and systems thereof Grant 8,223,458 - Mochizuki , et al. July 17, 2	2012-07-17
Perpendicular magnetic recording head having a grooved wrap around shield and method for manufacturing the same Grant 8,189,293 - Wakabayashi , et al. May 29, 2	2012-05-29
Noise And Particle Shield For Contact Sensor In A Slider App 20120120528 - Furukawa; Masaru ; et al.	2012-05-17
Perpendicular magnetic recording head and method for manufacturing the same Grant 8,064,161 - Kudo , et al. November 22, 2	2011-11-22
Magnetic Head Having An Asymmetrical Shape And Systems Thereof App 20110249359 - Mochizuki; Masafumi ; et al.	2011-10-13
Magnetic shield, manufacturing method thereof and thin film magnetic head employing the same Grant 7,995,311 - Kudo , et al. August 9, 2	2011-08-09
Magnetic Recording Head And Magnetic Disk Storage Device App 20110141616 - Tagawa; Ikuya ; et al.	2011-06-16
Magnetic Head For Perpendicular Recording App 20110141615 - Kudo; Kazue ; et al.	2011-06-16
Head-slider Including Thin-film Magnetic-recording Head Having Reduced Thermal Protrusion App 20110116192 - FUJITA; Shigeo ; et al.	2011-05-19
Head-gimbal Assembly Including A Transmission-line Structure For High-density Magnetic Recording App 20110090602 - NISHIYAMA; Nobumasa ; et al.	2011-04-21
Magnetic recording apparatus with correlated main magnetic pole-to-shields spacing and main magnetic pole-to-medium layers spacing Grant 7,920,359 - Maruyama , et al. April 5, 2	2011-04-05
Perpendicular Magnetic Recording Head And Magnetic Recording Device Suitable For High-density Magnetic Recording App 20110002063 - Maruyama; Yohji ; et al.	2011-01-06
Magnetic film, manufacturing method thereof and thin film magnetic head Grant 7,842,408 - Kudo , et al. November 30, 2	2010-11-30
Perpendicular Magnetic Recording Head App 20100157476 - Kudo; Kazue ; et al.	2010-06-24
Magnetic head having first and second protective films with different coefficients of linear expansion Grant 7,460,335 - Maruyama , et al. December 2, 2	2008-12-02
Magnetic disk drive Grant 7,443,625 - Hamaguchi , et al. October 28, 2	2008-10-28
Magnetic recording apparatus App 20080180861 - Maruyama; Yohji ; et al.	2008-07-31
Magnetic film, manufacturing method thereof and thin film magnetic head App 20080075977 - Kudo; Kazue ; et al.	2008-03-27
Magnetic recording head and method for manufacturing Grant 7,333,301 - Etoh , et al. February 19, 2	2008-02-19
Magnetic shield, manufacturing method thereof and thin film magnetic head employing the same App 20080002308 - Kudo; Kazue ; et al.	2008-01-03
Inductive head and magnetic disk apparatus Grant 7,110,218 - Narumi , et al. September 19, 2	2006-09-19
Magnetic head and magnetic recording/retrieving apparatus using the same App 20060198056 - Maruyama; Yohji ; et al.	2006-09-07
Magnetic disk drive App 20060187578 - Hamaguchi; Takehiko ; et al.	2006-08-24
Magnetic head for reducing projection of retrieving and writing unit from float surface, and magnetic recording/retrieving apparatus using the same Grant 7,064,925 - Maruyama , et al. June 20, 2	2006-06-20
Magnetic disk device having a write head to write by shifting in a radial direction Grant 7,057,838 - Hamaguchi , et al. June 6, 2	2006-06-06
Disk drive having magnetic head conduction paths with arrangements to control impedance Grant 7,016,156 - Maruyama , et al. March 21, 2	2006-03-21
Disk drive having magnetic head conduction paths with arrangements to control impedance Grant 6,894,874 - Maruyama , et al. May 17, 2	2005-05-17
Magnetic disk drive App 20050063097 - Maruyama, Yohji ; et al.	2005-03-24
Thin film magnetic head and magnetic storage apparatus App 20050007698 - Kudo, Kazue ; et al.	2005-01-13
Magnetic recording head and method for manufacturing App 20040240121 - Etoh, Kimitoshi ; et al.	2004-12-02
Thin film magnetic head and magnetic storage apparatus Grant 6,795,272 - Kudo , et al. September 21, 2	2004-09-21
Inductive head and magnetic disk apparatus App 20040165310 - Narumi, Shunichi ; et al.	2004-08-26
Magnetic disk drive App 20040125489 - Maruyama, Yohji ; et al.	2004-07-01
Magnetic head and magnetic recording/retrieving apparatus using the same App 20040109262 - Maruyama, Yohji ; et al.	2004-06-10
Recording equalizer and magnetic recording/reproducing apparatus using the equalizer Grant 6,728,051 - Igarashi , et al. April 27, 2	2004-04-27
Inductive head and magnetic disk apparatus Grant 6,721,132 - Narumi , et al. April 13, 2	2004-04-13
Method for reproducing information on a recording medium Grant 6,683,823 - Saga , et al. January 27, 2	2004-01-27
Magnetic disk drive Grant 6,661,613 - Maruyama , et al. December 9, 2	2003-12-09
Magnetic disk drive App 20030189774 - Hamaguchi, Takehiko ; et al.	2003-10-09
Recording equalizer and magnetic recording/reproducing apparatus using the equalizer App 20030142430 - Igarashi, Masukazu ; et al.	2003-07-31
Method for reproducing information on a recording medium App 20030123333 - Saga, Hideki ; et al.	2003-07-03
Magnetic disk drive App 20030103294 - Maruyama, Yohji ; et al.	2003-06-05
Thin film magnetic head and magnetic storage apparatus App 20030095357 - Kudo, Kazue ; et al.	2003-05-22
Information recording/reproducing device Grant 6,560,168 - Saga , et al. May 6, 2	2003-05-06
Method of forming thin film magnetic recording head with narrow track width performing high density recording at high driving frequency Grant 6,530,141 - Komuro , et al. March 11, 2	2003-03-11
Recording equalizer and magnetic recording/reproducing apparatus using the equalizer App 20030026024 - Igarashi, Masukazu ; et al.	2003-02-06
Recording equalizer and magnetic recording/reproducing apparatus using the equalizer App 20020114093 - Igarashi, Masukazu ; et al.	2002-08-22
Magnetic disk drive App 20020109944 - Maruyama, Yohji ; et al.	2002-08-15
Magnetic disk drive with integrated electrical conductors for recording element Grant 6,404,594 - Maruyama , et al. June 11, 2	2002-06-11
Inductive head and magnetic disk apparatus App 20020018318 - Narumi, Shunichi ; et al.	2002-02-14
Method of forming thin film magnetic recording head with narrow track width performing high density recording at high driving frequency App 20010027603 - Komuro, Matahiro ; et al.	2001-10-11
Recording equalizer and magnetic recording/reproducing apparatus using the equalizer App 20010007516 - Igarashi, Masukazu ; et al.	2001-07-12
Magnetic head with a magnetic pole sandwiched between conductive materials Grant 6,104,574 - Takano , et al. August 15, 2	2000-08-15
Thin film magnetic recording head with very narrow track width performing high density recording at high driving frequency Grant 6,091,582 - Komuro , et al. July 18, 2	2000-07-18
Magnetic head and slider configuration for contact recording having a plurality of tapered surfaces Grant 5,898,540 - Maruyama , et al. April 27, 1	1999-04-27

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