ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,772, issued on May 27, was assigned to Tula eTechnology Inc. (San Jose, Calif.).

"Pulse modulated control with field weakening for improved machine efficiency" was invented by Paul Carvell (San Jose, Calif.) and Adya S. Tripathi (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Modulated pulse control of electric machines to deliver a desired output in a more energy efficient manner by either (a) operating the electric machine in a continuous mode when a requested torque demand is greater than the peak efficiency torque of the electric machine or (b) in a pulsed modulation mode when the requested torque demand is less than the peak ef...