ALEXANDRIA, Va., June 19 -- United States Patent no. 12,333,881, issued on June 17, was assigned to Amazon Technologies Inc. (Seattle).

"Group determination and association" was invented by Michael Lemmon (Seattle), Vinodh Muthiah (Seattle), Yi Xiang (Seattle) and Timothy Liaw (Sammamish, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Described are implementations that facilitate group determination and association at entry into a facility so that activities of group members of the group are associated with the group and/or applied to a single account designated for the group. For example, if four individuals enter the facility together, the disclosed implementations determine whether the four individu...