ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,499,257, issued on Dec. 16, was assigned to Tetrate.io (San Francisco).

"Repeatable NGAC policy class structure" was invented by Zack Daniel Butcher (San Francisco), Ignacio Barrera Caparros (Barcelona, Spain) and Joshua Douglas Roberts (Ashburn, Va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "In implementations of a repeatable NGAC policy class structure, a computing device implements a next generation access control (NGAC) graph that includes user elements representing users, object elements representing resources, and multiple policy classes modeled with a composable policy class structure that is repeatable to instantiate each of the multiple pol...