ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,623, issued on May 20, was assigned to Lockheed Martin Corp. (Bethesda, Md.).

"Blended airspeed technique for helicopter control at low airspeeds" was invented by Jay Benjamin Monahan (Toms River, N.J.) and Erez Eller (Oakville, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for controlling a rotary wing aircraft includes determining a measured airspeed of the rotary wing aircraft based on data from a pitot probe, determining an estimated airspeed of the rotary wing aircraft based on rotor control commands, and determining a blended airspeed based on both the measured airspeed and the estimated airspeed."

The patent was filed on July...