ALEXANDRIA, Va., June 2 -- United States Patent no. 12,645,667, issued on June 2, was assigned to TRAENT S.R.L. (Italy).

"Inter-ledger relationships" was invented by Federico D'Annunzio (Florence, Italy), Fabio Severino (Pisa, Italy), Andrea Canciani (Pisa, Italy) and Claudio Felicioli (Pisa, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method (502; 514; 530) is provided for managing, under the control of a computing system, a plurality of ledgers (Lk). Each ledger comprises a corresponding persistent sequence of data blocks (DB), each ledger (Lk) being participated by a corresponding set of participant nodes (PNi) of the computing system, the method comprising: -for at least one of said sets of pa...