Joon Chang

This inventor holds 30 USPTO granted patents and 4 published patent applications, primarily in File System Management. Top assignee: International Business Machines Corporation. Active years: 2003-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Joon Chang. Retrieved from https://idiyas.com/inventor/joon-chang

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

USPTO Granted Patents = 30 (Patent Applications = 4)

% Patents Active = 26.7

Average Co-Inventor Count = 2.9

ph-index = 6

Forward Citations = 276(Granted Patents)

Company Filing History:

30 out of 166,409

International Business Machines Corporation

patents

Years Active: 2003-2015

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Areas of Expertise:

File Cloning

Redirect-On-Write

Snapshot Persistence

Data Access Management

Extended Attributes

Block Map

Clustered Filesystem

Inode Management

Temporary Files

Incremental Truncates

Differential Backup

Multi-Threaded Environment

30 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9020899 - File cloning across different filesets (2015-04-28),

2. 8959227 - In-flight block map for a clustered redirect-on-write filesystem (2015-02-17),

3. 8904006 - In-flight block map for a clustered redirect-on-write filesystem (2014-12-02),

4. 8799333 - Delayed deletion of extended attributes (2014-08-05),

5. 8666943 - File cloning across different filesets (2014-03-04),

6. 8650158 - File cloning across different filesets (2014-02-11),

7. 8626713 - Multiple contexts in a redirect on write file system (2014-01-07),

8. 8521690 - Using a sparse file as a clone of a file (2013-08-27),

9. 8495112 - Distributed file hierarchy management in a clustered redirect-on-write file system (2013-07-23),

10. 8458181 - Distributed free block map for a clustered redirect-on-write file system (2013-06-04),

11. 8396833 - Inode management in redirect-on-write file system (2013-03-12),

12. 8396832 - Independent fileset generations in a clustered redirect-on-write filesystem (2013-03-12),

13. 8306950 - Managing data access requests after persistent snapshots (2012-11-06),

14. 8195611 - Using a sparse file as a clone of a file (2012-06-05),

15. 8190657 - Method and system for handling reallocated blocks in a file system (2012-05-29),

Title: Inventor Joon Chang

Introduction: Joon Chang is a prolific inventor based in Austin, TX, known for his groundbreaking contributions to various industries.

Latest Patents: Joon Chang holds several patents in the fields of technology, healthcare, and consumer products, showcasing his diverse range of innovations.

Career Highlights: With a career spanning over two decades, Joon Chang has established himself as a visionary inventor with a keen eye for identifying gaps in the market and developing unique solutions.

Collaborations: Throughout his career, Joon Chang has collaborated with leading companies, research institutions, and universities to bring his inventions to life, further solidifying his reputation as a top innovator.

Conclusion: Joon Chang's passion for innovation and his relentless drive to push the boundaries of what is possible make him a standout figure in the world of inventors.

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]

4 patents pending: