U.S. Patent 9853819 was awarded to Guardtime SA on December 26, 2017 and is entitled “Blockchain-supported, node ID-augmented digital record signature method.” The first named inventor is Ahto Truu of Tartu, . The abstract contains an overview of the patent disclosure:

At least one node in a distributed hash tree verification infrastructure is augmented with an identifier of an entity in a registration path. A data signature, which includes parameters for recomputation of a verifying value, and which is associated with a digital input record, will therefore also include data that identifies at least one entity in the hash tree path used for its initial registration in the infrastructure. An uppermost value of the hash tree verification infrastructure is entered as, or as part of, a transaction in a blockchain. Link to Full Patent

This blockchain patent was originally filed on October 17, 2016  as U.S. Patent Application 15/295928 at the United Stated Patent and Trademark Office. The application was them awarded a patent grant and published as U.S. Patent 9853819. The primary examiner was Minh Dinh.

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 12 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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