ALEXANDRIA, Va., June 9 -- United States Patent no. 12,289,101, issued on April 29, was assigned to Sanan Japan Technology Corp. (Tokyo).
"Duplexer" was invented by Yuki Koto (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A duplexer includes a piezoelectric substrate, a receiving filter formed on the piezoelectric substrate, the receiving filter includes a plurality of resonators, and a transmitting filter formed on the piezoelectric substrate, the transmitting filter includes a plurality of resonators. One of the resonators of the receiving filter is a multi-mode type acoustic wave resonator having a capacitance that is two times or more the average capacitance of the other resonators formed on the p...