U.S. Patent 11139960 was awarded to INTERNATIONAL BUSINESS MACHINES CORPORATION on October 05, 2021 and is entitled “File redaction database system.” The first named inventor is Sharathchandra U. Pankanti of Darien, CT. The abstract contains an overview of the patent disclosure:

An example operation may include one or more of determining, by a file redaction device, redacted segments of a source file, receiving, by a signature update device, the redacted source file segments, a stored trapdoor key, and stored auxiliary data segments, determining modified auxiliary data from the redacted source file segments, the trapdoor key and the auxiliary data segments, executing chaincode to obtain a modified auxiliary data signature and identifiers of the redacted source file segments, and storing the modified auxiliary data signature and identifiers of the redacted source file segments to a shared ledger of a blockchain network. Each stored auxiliary data segment including a random string of data corresponding to a segment of the source file. Link to Full Patent

This blockchain patent was originally filed on December 20, 2018  as U.S. Patent Application 16/227166 at the United Stated Patent and Trademark Office. The application was them awarded a patent grant and published as U.S. Patent 11139960. The primary examiner was Darren B Schwartz.

INTERNATIONAL BUSINESS MACHINES CORPORATION, who is the original assignee of this patent, has at least 150818 total granted patents in the United States as of the date of this article. This blockchain patent has been cited 0 times by other U.S. patents according to our law firm research, and can be considered an innovative patent in the field of cryptocurrency and blockchain.

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