Chuanwen Ji

This inventor holds 22 USPTO granted patents, primarily in Data Storage Technology. Top assignee: Western Digital Technologies, Inc.. Active years: 2005-2023.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Chuanwen Ji. Retrieved from https://idiyas.com/inventor/chuanwen-ji

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 22

% Patents Active = 50.0

Average Co-Inventor Count = 3.3

ph-index = 10

Forward Citations = 1,001(Granted Patents)

Location History:

Lake Forest, CA (US) (2005)
Irvine, CA (US) (2006 - 2023)

Company Filing History:

22 out of 5,432

Western Digital Technologies, Inc.

patents

Years Active: 2005-2023

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Areas of Expertise:

Data Recovery Procedure

Microactuator Evaluation

Vibration Sensor Outputs

NAND Memory

Servo Signal

Spindle Motor Failure

Write Protection

Temperature Compensation

Disk Drive Characterization

Wedge Spindle Control

Lifetime Logging

Acoustic Noise Reduction

22 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11790949 - Data storage device integrating wedge repeatable runout (WRRO) learning into data recovery procedure (DRP) (2023-10-17),

2. 11482253 - Per head, per profile finalize to move repeatable runout compensation values to NAND memory (2022-10-25),

3. 11456014 - Repeatable runout compensation value generation (2022-09-27),

4. 10629234 - Data storage device computing notch filters for multiple temperatures (2020-04-21),

5. 9355666 - Disk drive measuring stroke difference between heads by detecting a difference between ramp contact (2016-05-31),

6. 9349401 - Electronic system with media scan mechanism and method of operation thereof (2016-05-24),

7. 9286927 - Data storage device demodulating servo burst by computing slope of intermediate integration points (2016-03-15),

8. 9142235 - Disk drive characterizing microactuator by injecting sinusoidal disturbance and evaluating feed-forward compensation values (2015-09-22),

9. 8929022 - Disk drive detecting microactuator degradation by evaluating frequency component of servo signal (2015-01-06),

10. 8922937 - Disk drive evaluating multiple vibration sensor outputs to enable write-protection (2014-12-30),

11. 8922931 - Disk drive releasing variable amount of buffered write data based on sliding window of predicted servo quality (2014-12-30),

12. 8913338 - Disk drive reducing write unsafe threshold when detecting an unrecoverable servo compensation value (2014-12-16),

13. 8804267 - Disk drive predicting spindle motor failure by evaluating current draw relative to temperature (2014-08-12),

14. 8797664 - Polarity detection of piezoelectric actuator in disk drive (2014-08-05),

15. 8605384 - Disk drive performing lifetime logging of microactuator sensitivity (2013-12-10),

Title: Innovations in Data Storage: The Patented Work of Chuanwen Ji

Introduction: Chuanwen Ji, an accomplished inventor based in Irvine, CA, has made significant contributions to the field of data storage through his impressive portfolio of 22 patents. His innovative approaches to data recovery mechanisms and repeatable runout compensation techniques have paved the way for enhanced performance in modern data storage devices.

Latest Patents: One of Ji's latest inventions is a data storage device that integrates wedge repeatable runout (WRRO) learning into the data recovery procedure (DRP). This device comprises a disk with multiple data tracks and servo wedges, which include fields designed to store WRRO compensation values relevant to these data tracks. The technology incorporates a read/write head actuated over the disk and a controller that gathers position error signal (PES) data, essential for calculating WRRO compensation values during the operation of the device. Additionally, Ji's method for processing hard disk drive (HDD) data track repeatable runout (RRO) compensation data utilizes single-level cell (SLC) areas of NAND memory components. This process involves saving RRO compensation data per read-write head for each data track, minimizing memory usage while ensuring data integrity.

Career Highlights: Ji has been instrumental in advancing the capabilities of data storage technologies at Western Digital Technologies, Inc. His focus on optimizing data recovery and compensation processes has significantly improved the efficiency and reliability of HDDs, demonstrating his commitment to innovation in the tech industry.

Collaborations: Throughout his career, Chuanwen Ji has worked closely with talented colleagues such as Duc T Phan and Yanan Huang. Their collaborative efforts reflect a shared vision for pushing the boundaries of data storage technology, leading to numerous advancements and patents.

Conclusion: Chuanwen Ji's dedication to innovation in data storage is evident through his numerous patents and collaborative work with fellow inventors. His contributions continue to shape the technology landscape, ensuring that data storage devices are more efficient and reliable than ever before. As his work progresses, it will be exciting to see how his inventions influence the future of data management and storage solutions.

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]