U.S. Patent 10425428 was awarded to Guardtime SA on September 24, 2019 and is entitled “Verification lineage tracking and transfer control of data sets.” The first named inventor is Hema Krishnamurthy of Phoenix, AZ. The abstract contains an overview of the patent disclosure:

Whenever users receive or transfer a copy of any of a set of documents, prior verification of the document is enforced by an administrative system, which associates verification metadata with the copy. As each copy is itself copied, possibly modified, and transferred, updated verification metadata is included with the previous verification metadata to form a verification lineage chain, which can later be examined to determine the circumstances of any verification failure. Documents are preferably verified by comparing the digital signature of the current copy with the signature of a reference copy. Documents may be signed by submitting them as transactions to a blockchain, with the blockchain receipt comprising the digital signature of the respective document. Link to Full Patent

This blockchain patent was originally filed on January 13, 2017  as U.S. Patent Application 15/405318 at the United Stated Patent and Trademark Office. The application was them awarded a patent grant and published as U.S. Patent 10425428. The primary examiner was Longbit Chai.

Guardtime SA, who is the original assignee of this patent, has at least 33 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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