ALEXANDRIA, Va., June 2 -- United States Patent no. 12,647,272, issued on June 2, was assigned to WALMART APOLLO LLC (Bentonville, Ark.).

"Nested blockchain system" was invented by Christopher M. Johnson (Bentonville, Ark.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Described in detail herein is a nested blockchain system. The nested blockchain system can include distributed nodes in a network. A node is configured to generate a master cryptographically verifiable distributed ledger represented by a sequence of blocks. The node spawns a first sub cryptographically verifiable ledger represented by a first genesis block containing a hash value referencing the first block generated in the master cryptographi...