ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,426,936, issued on Sept. 30, was assigned to Covidien LP (Mansfield, Mass.).

"Ultrasonic and radiofrequency energy production and control from a single power converter" was invented by Steven C. Rupp (Arvada, Colo.), Robert B. Smith (Loveland, Colo.) and Daniel A. Friedrichs (Aurora, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A generator is configured to output two or more waveforms at different frequencies. In particular, the generator is configured to provide an ultrasonic waveform, which may be suitable for driving a transducer of an ultrasonic surgical instrument, and electrosurgical radiofrequency energy, which may be suitable for electr...