ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,501, issued on April 15, was assigned to HRL LABORATORIES LLC (Malibu, Calif.).
"Spar transmitter" was invented by Christopher P. Henry (Thousand Oaks, Calif.), Walter S. Wall (Calabasas, Calif.) and Carson R. White (Agoura Hills, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A spar buoy for very low frequency (VLF) or low frequency (LF) transmission including a first portion of the spar buoy extending above a mean water line including a conductive structure including a coaxial feed, and an antenna coupled to the coaxial feed and extending above the conductive structure, and a second portion of the spar buoy below the mean water line includin...