ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,898, issued on Nov. 18, was assigned to Kerr Machine Co. (Sulphur, Okla.).

"Linear drive assembly" was invented by Kelcy Jake Foster (Sulphur, Okla.), Micheal Cole Thomas (Azle, Texas), Christopher Todd Barnett (Stratford, Okla.), Nicholas Son (Davis, Okla.), John Keith (Ardmore, Okla.) and Guy J. Lapointe (Sulphur, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A linear drive assembly configured for use within a power end assembly. The linear drive assembly is configured to interconnect a crankshaft and a pony rod and comprises a crosshead assembly attached to a connecting rod assembly. In one or more embodiments disclosed herein, the connect...