U.S. Patent 11151526 was awarded to THE TORONTO-DOMINION BANK on October 19, 2021 and is entitled “Systems and methods for establishing and enforcing transaction-based restrictions using hybrid public-private blockchain ledgers.” The first named inventor is Paul Mon-Wah Chan of Toronto, . The abstract contains an overview of the patent disclosure:

The disclosed embodiments include computerized systems and methods that generate secured blockchain-based ledger structures that facilitate event-based control of tracked assets. In one embodiment, an apparatus associated with a rules authority of the secured blockchain-based ledger may obtain data indicative of an initiated transfer of funds between parties, and may access and decrypt a set of restrictions imposed on the initiated transfer and a set of rules associated with the restrictions, which may hashed into the secured blockchain-based ledger using a confidentially-held master cryptographic key. The apparatus may determine that the initiated transfer violates at least one of the restrictions, and may perform operations consistent with at least one of the rules associated with the at least one violated restriction. Link to Full Patent

This blockchain patent was originally filed on November 09, 2015  as U.S. Patent Application 14/935799 at the United Stated Patent and Trademark Office. The application was them awarded a patent grant and published as U.S. Patent 11151526. The primary examiner was Chinedu C Agwumezie.

THE TORONTO-DOMINION BANK, who is the original assignee of this patent, has at least 258 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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