ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,313, issued on March 3, was assigned to FMC Corp. (Philadelphia).

"Material delivery systems and methods" was invented by Xuan Li (Philadelphia), Edward Brinton Lang (Philadelphia), Mark Jefferson Whitley (Philadelphia) and Darryl A. Meade (Philadelphia).

According to the abstract* released by the U.S. Patent & Trademark Office: "Described herein is an aerial material delivery system, which includes an unmanned aerial vehicle (UAV) and a material dispensing assembly mounted to the UAV. The material dispensing assembly includes a rotary cartridge defining a plurality of channels extending parallel to a longitudinal axis of the rotary cartridge, each channel retaining a respective ...