ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,731,452, issued on Sept. 8, was assigned to Accessia Technology Ltd (Uxbridge, Great Britain).

"Access control system" was invented by Paul Richard Witty (Virginia Water, Great Britain) and Nikola Ilkov Bozhinov (Uxbridge, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "An access control system for controlling access to restricted physical areas, the access control system comprising: a first access control apparatus for controlling access to a first restricted physical area, the first access control apparatus comprising a first data store storing a first list of access tokens by which the first restricted physical area can be accessed; and ...