ALEXANDRIA, Va., June 5 -- United States Patent no. 12,274,451, issued on April 15, was assigned to Vasper Systems LLC (Kamuela, Hawaii).

"Bluetooth communication protocol for a pressure controller" was invented by Jay A. Chesavage (Palo Alto, Calif.), Marshall Lise (Mountain View, Calif.) and Eric Hoffman (San Francisco).

According to the abstract* released by the U.S. Patent & Trademark Office: "A pressure controller for a fluidic bladder has in sequence a pump, a first fluid line, a supply pressure sensor, a second fluid line, a bladder having an inlet coupled to the second fluid line, a bladder outlet coupled to a third fluid line of substantially equal length to the second fluid line, a return pressure sensor, and a fourth fluid line...