Liu; Kowang

Patent Applications and Registrations

Patent applications and USPTO patent grants for Liu; Kowang.The latest application filed is for "light source unit and thermally-assisted magnetic head".

Company Profile

7.41.25

Liu; Kowang - Fremont CA
LIU; Kowang - Milpitas CA

*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
Patterned reader shields for a cooler reader Grant 11,289,116 - Liu , et al. March 29, 2	2022-03-29
Protective shields under touchdown conditions for thermally assisted perpendicular magnetic recording Grant 11,211,084 - Zeng , et al. December 28, 2	2021-12-28
Light Source Unit And Thermally-assisted Magnetic Head App 20210013695 - HONDA; Takashi ; et al.	2021-01-14
Heat sink structure for microwave-assisted magnetic recording (MAMR) head Grant 10,811,034 - Wu , et al. October 20, 2	2020-10-20
Heat Sink Structure for Microwave-Assisted Magnetic Recording (MAMR) Head App 20200312354 - Wu; Yan ; et al.	2020-10-01
Bumper pad design for TAMR drives Grant 10,629,233 - Ngan , et al.	2020-04-21
Semiconductor laser for thermally-assisted magnetic recording head Grant 10,566,013 - Honda , et al. Feb	2020-02-18
Magnetic core and coil design for double perpendicular magnetic recording (PMR) writers Grant 10,482,905 - Liu , et al. Nov	2019-11-19
Magnetic Core And Coil Design For Double Perpendicular Magnetic Recording (pmr) Writers App 20190304490 - Liu; Kowang ; et al.	2019-10-03
Dual write heater for slider surface topography control in double perpendicular magnetic recording (PMR) writers Grant 10,360,935 - Liu , et al.	2019-07-23
Magnetic core and coil design for double perpendicular magnetic recording (PMR) writers Grant 10,311,900 - Liu , et al.	2019-06-04
Dual perpendicular magnetic recording (PMR) writer application with special up and down head assignment for best areal density in hard disk drive (HDD) Grant 10,279,451 - Liu , et al.	2019-05-07
Dynamic flying height read/write head with off-track contact capability at touch down in hard disk drives Grant 9,659,584 - Liu May 23, 2	2017-05-23
Magnetic pole self-annealing with current injection in perpendicular magnetic recording (PMR) Grant 9,218,830 - Wu , et al. December 22, 2	2015-12-22
Magnetic Pole Self-Annealing with Current Injection in Perpendicular Magnetic Recording (PMR) App 20150243306 - Wu; Yan ; et al.	2015-08-27
Method of forming a PMR writer device with multi-level tapered write pole Grant 9,105,287 - Bai , et al. August 11, 2	2015-08-11
PMR writer device with multi-level tapered write pole Grant 9,025,280 - Bai , et al. May 5, 2	2015-05-05
Method of manufacturing a perpendicular magnetic recording head laminated with AFM-FM phase change material Grant 8,881,376 - Zhou , et al. November 11, 2	2014-11-11
Plasmon generator self-annealing with current injection in TAMR Grant 8,848,495 - Wu , et al. September 30, 2	2014-09-30
Dual-Piece Heat Sink Layer for Robust Reader in Magnetic Recording Head App 20140268423 - Wu; Yan ; et al.	2014-09-18
Dual-piece heat sink layer for robust reader in magnetic recording head Grant 8,817,425 - Wu , et al. August 26, 2	2014-08-26
Insertion under read shield for improved read gap actuation in dynamic flying height Grant 8,810,962 - Wu , et al. August 19, 2	2014-08-19
PMR Writer Device with Multi-Level Tapered Write Pole App 20140177103 - Bai; Zhigang ; et al.	2014-06-26
PMR writer device with multi-level tapered write pole Grant 8,670,212 - Bai , et al. March 11, 2	2014-03-11
TAMR structure with HDI sensor for head-disk interference and temperature rise sensing Grant 8,654,618 - Liu , et al. February 18, 2	2014-02-18
Thermally-assisted magnetic recording head capable of reducing the transient protrusion of an antenna Grant 8,593,915 - Schreck , et al. November 26, 2	2013-11-26
Perpendicular magnetic recording head laminated with AFM-FM phase change material Grant 8,446,692 - Zhou , et al. May 21, 2	2013-05-21
PMR Writer Device with Multi-Level Tapered Write Pole App 20130003226 - Bai; Zhigang ; et al.	2013-01-03
Method of Forming a PMR Writer Device with Multi-Level Tapered Write Pole App 20130001190 - Bai; Zhigang ; et al.	2013-01-03
Composite writer shield for improving writer performance Grant 8,274,758 - Wu , et al. September 25, 2	2012-09-25
PMR writer device with multi-level tapered write pole Grant 8,264,792 - Bai , et al. September 11, 2	2012-09-11
Perpendicular magnetic recording head laminated with AFM-FM phase change material App 20120087042 - Zhou; Yuchen ; et al.	2012-04-12
Vertically stacked DFH heater design for protrusion shape control Grant 8,094,418 - Schreck , et al. January 10, 2	2012-01-10
PMR write with flux choking area Grant 8,085,498 - Bai , et al. December 27, 2	2011-12-27
Perpendicular magnetic recording head laminated with AFM-FM phase change material App 20110308074 - Zhou; Yuchen ; et al.	2011-12-22
Power control of TAMR element during read/write transition App 20110292773 - Schreck; Erhard ; et al.	2011-12-01
Ta/W film as heating device for dynamic fly height adjustment Grant 8,054,583 - Zheng , et al. November 8, 2	2011-11-08
Electric field assisted magnetic recording Grant 8,023,218 - Zhou , et al. September 20, 2	2011-09-20
Perpendicular magnetic recording head laminated with AFM-FM phase change material Grant 8,004,794 - Zhou , et al. August 23, 2	2011-08-23
Power control of TAMR element during read/write transition Grant 7,995,425 - Schreck , et al. August 9, 2	2011-08-09
Magnetic head for perpendicular magnetic recording including a stopper layer for suppressing protrusion of the front end face of a shield Grant 7,933,095 - Sasaki , et al. April 26, 2	2011-04-26
PMR write with flux choking area App 20110063755 - Bai; Zhigang ; et al.	2011-03-17
Insertion under read shield for improved read gap actuation in dynamic flying height App 20100309581 - Wu; Yan ; et al.	2010-12-09
PMR writer device with multi-level tapered write pole App 20100277832 - Bai; Zhigang ; et al.	2010-11-04
Power control of TAMR element during read/write transition App 20100232050 - Schreck; Erhard ; et al.	2010-09-16
Heat extractor for magnetic reader-writer Grant 7,748,439 - Liu , et al. July 6, 2	2010-07-06
Electric field assisted magnetic recording App 20100128377 - Zhou; Yuchen ; et al.	2010-05-27
Ta/W film as heating device for dynamic fly height adjustment App 20090323227 - Zheng; Min ; et al.	2009-12-31
Composite writer shield for improving writer performance App 20090310262 - Wu; Yan ; et al.	2009-12-17
Vertically stacked DFH heater design for protrusion shape control App 20090251828 - Schreck; Erhard ; et al.	2009-10-08
Magnetic head for perpendicular magnetic recording and method of manufacturing same App 20090141406 - Sasaki; Yoshitaka ; et al.	2009-06-04
Perpendicular magnetic recording head laminated with AFM-FM phase change material App 20090052092 - Zhou; Yuchen ; et al.	2009-02-26
Dynamic flying height design with off-track contact capability at touch down in hard disk drives App 20080225427 - Liu; Kowang	2008-09-18
Magnetostrictive actuator in a magnetic head Grant 7,385,789 - Hu , et al. June 10, 2	2008-06-10
Magnetostrictive actuator in a magnetic head App 20050243473 - Hu, David ; et al.	2005-11-03
Heat extractor for magnetic reader-writer App 20050225897 - Liu, Kowang ; et al.	2005-10-13
Precision dispensing apparatus and method for manufacturing thin-film optical assembly Grant 6,608,724 - Liu , et al. August 19, 2	2003-08-19
Precision dispensing apparatus and method for manufacturing thin-film optical assembly App 20020060862 - Liu, Kowang ; et al.	2002-05-23

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