US Patent Issued to Apple on April 22 for "Duplexer measurement and tuning systems" (German, Austrian, American Inventors)

ALEXANDRIA, Va., June 6 -- United States Patent no. 12,283,936, issued on April 22, was assigned to Apple Inc. (Cupertino, Calif.).

"Duplexer measurement and tuning systems" was invented by Christof Pfannenmuller (Erlangen, Germany), Dominic Koehler (Viereth-Trunstadt, Germany), Julian W Zuber (Erlangen, Germany), Oliver Georg Dorn (Erlangen, Germany), Bjoern Lenhart (Nuremberg, Germany), Harald Pretl (Schwertberg, Austria), Rastislav Vazny (Sunnyvale, Calif.) and Christian F Tanzer (Perlesreut, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods combine a test signal with a wanted (downlink or uplink) signal at an input of a duplexer of a communication device, and receive the test sig...