ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,868, issued on Oct. 14, was assigned to VERMON SA (Tours, France).
"Frequency-tunable ultrasonic device" was invented by Cyril Meynier (Tours, France) and Dominique Gross (Tours, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ultrasonic device, comprising an ultrasonic transducer (400) comprising: a membrane (405) suspended above a cavity (403) arranged on the upper surface side of a substrate (401); a piezoelectric layer (407) attached to a surface of the membrane (405); a first electrode (E1) arranged on the lower surface side of the cavity (403); and a second electrode (E3) arranged on the upper surface side of the cavity (403), in cont...