ALEXANDRIA, Va., March 12 -- United States Patent no. 12,250,494, issued on March 11, was assigned to Shenzhen Vision Power Technology Co. Ltd. (Shenzhen, China).

"Method and system for optical monitoring of unmanned aerial vehicles based on three-dimensional light field technology" was invented by Ying Chiu Herbert Lee (Hong Kong) and Li-Hua Lilly Li (Hong Kong).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed in the present invention are a method and a system for monitoring unmanned aerial vehicles based on three-dimensional light field technology. Provided is an unmanned aerial vehicle monitoring method based on three-dimensional light field technology, comprising: beginning unmanned aerial vehicle...