ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,634, issued on March 18, was assigned to SOITEC (Bernin, France).
"Surface elastic wave filter with resonant cavities" was invented by Eric Michoulier (Besancon, France), Sylvain Ballandras (Besancon, France) and Thierry LaRoche (Besancon, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A surface elastic wave filter has resonant cavities and comprises a composite substrate formed of a base substrate and a piezoelectric upper layer; at least one input electroacoustic transducer and an output electroacoustic transducer, arranged on the upper layer, and at least one internal reflecting structure, arranged between the input electroacoustic transd...