ALEXANDRIA, Va., March 24 -- United States Patent no. 12,582,233, issued on March 24, was assigned to Medway Plastics Corp. (Long Beach, Calif.).

"Apparatus and methods for the understructure of a chair base" was invented by Thomas A. Hutchinson Jr. (Coto De Caza, Calif.), Gerald A. Hutchinson (Austin, Texas) and Richard E. Hutchinson (Lakewood, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The embodiments relate to a geometric under structure, central and outer hub for a GFN plastic chair base. The geometric shape and dimensions are critical components to the overall strength of the chair base hub and arms when either vertical or rotational forces are applied at the central hub. The central hub is o...