ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,734, issued on May 13, was assigned to Baker Hughes Oilfield Operations LLC (Houston).

"Downhole bar antenna with distributed windings" was invented by Martin Folberth (Celle, Germany), Jens Behnsen (Celle, Germany), Andreas Hartmann (Celle, Germany), Sven-Hendrik Lampe (Celle, Germany), Nikolay Nikolaevich Velker (Novosibirsk, Russia), David Sergeevich Vlasov (Novosibirsk, Russia) and Alexander S. Vershinin (Novosibirsk, Russia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A downhole antenna tool is disclosed for downhole well-logging or other downhole operations. Antenna bars are provided for winding of coils through associated coil carriers of i...