ALEXANDRIA, Va., June 4 -- United States Patent no. 12,318,792, issued on June 3, was assigned to INTELLIGENT EQUIPMENT RESEARCH CENTER, BEIJING ACADEMY OF AGRICULTURE AND FORESTRY SCIENCES (Haidian District, China).

"Nozzle device for plant protection unmanned aerial vehicle and droplet diameter control method thereof" was invented by Ruirui Zhang (Beijing), Liping Chen (Beijing), Longlong Li (Beijing), Chenchen Ding (Beijing) and Tongchuan Yi (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a nozzle device for a plant protection unmanned aerial vehicle and a droplet diameter control method thereof. The nozzle device for a plant protection unmanned aerial vehicle includes a flexible nozz...