CJ

Chuanwen Ji

WT Western Digital Technologies: 22 patents #111 of 3,180Top 4%
📍 Irvine, CA: #445 of 6,241 inventorsTop 8%
🗺 California: #25,620 of 386,348 inventorsTop 7%
Overall (All Time): #193,553 of 4,157,543Top 5%
22
Patents All Time

Issued Patents All Time

Showing 1–22 of 22 patents

Patent #TitleCo-InventorsDate
11790949 Data storage device integrating wedge repeatable runout (WRRO) learning into data recovery procedure (DRP) Jim French, Austin Striegel, Gary Herbst 2023-10-17
11482253 Per head, per profile finalize to move repeatable runout compensation values to NAND memory Zaifeng Chen 2022-10-25
11456014 Repeatable runout compensation value generation Zaifeng Chen 2022-09-27
10629234 Data storage device computing notch filters for multiple temperatures Hengchang Guo, Tetsuo Ueda, Alexander Babinski, Shinsuke Nakagawa 2020-04-21
9355666 Disk drive measuring stroke difference between heads by detecting a difference between ramp contact Yanan Huang, Zhenyu Zhang, Duc T. Phan 2016-05-31
9349401 Electronic system with media scan mechanism and method of operation thereof Alexander Babinski, Zhenyu Zhang, Eugene Chun-Tsing Wu, Alan M. Fossen, Duc T. Phan +1 more 2016-05-24
9286927 Data storage device demodulating servo burst by computing slope of intermediate integration points Shan Tang, Zhenyu Zhang, Duc T. Phan 2016-03-15
9142235 Disk drive characterizing microactuator by injecting sinusoidal disturbance and evaluating feed-forward compensation values Alexander Babinski, Lingfei Zhou, Nathan J. Santee, Duc T. Phan 2015-09-22
8929022 Disk drive detecting microactuator degradation by evaluating frequency component of servo signal Yanan Huang, Shan Tang, Duc T. Phan, Alain Chahwan 2015-01-06
8922937 Disk drive evaluating multiple vibration sensor outputs to enable write-protection Alain Chahwan, Orhan Beker 2014-12-30
8922931 Disk drive releasing variable amount of buffered write data based on sliding window of predicted servo quality Alain Chahwan, Orhan Beker, Yanan Huang, Duc T. Phan 2014-12-30
8913338 Disk drive reducing write unsafe threshold when detecting an unrecoverable servo compensation value Alain Chahwan, Yanan Huang 2014-12-16
8804267 Disk drive predicting spindle motor failure by evaluating current draw relative to temperature Yanan Huang, Duc T. Phan, Chui Lyn Cheong 2014-08-12
8797664 Polarity detection of piezoelectric actuator in disk drive Hengchang Guo, Duc T. Phan, Yanan Huang, Yakov M. Lifschitz 2014-08-05
8605384 Disk drive performing lifetime logging of microactuator sensitivity Yanning Liu, Duc T. Phan, Ming Wang 2013-12-10
8553351 Disk drive correcting track ID in response to an estimated radial location and a burst PES Aswartha Narayana, Duc T. Phan, Min Chen, Hengchang Guo 2013-10-08
8335049 Disk drive detecting crack in microactuator Yanning Liu, Nathan J. Santee 2012-12-18
7660067 Disk drive initializing a coil temperature estimation algorithm using a resistance of the coil estimated during a load operation Jianghong Ding, Duc T. Phan 2010-02-09
7253582 Disk drive estimating angular position of spindle motor during spin-up by computing differences in winding current rise times Jianghong Ding, David D. Nguyen 2007-08-07
7068463 Disk drive employing a velocity profile and back EMF feedback to control a voice coil motor Jianghong Ding 2006-06-27
6954324 Disk drive disabling BEMF detection window to reduce acoustic noise while using wedge spindle speed control Kuang-Yang Tu 2005-10-11
6914740 Disk drive employing BEMF spindle speed control or wedge spindle speed control Kuang-Yang Tu 2005-07-05