ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,077, issued on May 27, was assigned to MITSUBISHI HEAVY INDUSTRIES LTD. (Tokyo).
"Ducted fan device and aircraft" was invented by Yuki Morisaki (Tokyo), Masayuki Oda (Tokyo) and Yasuhiro Saiki (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ducted fan device includes: a plurality of fan devices each having a fan configured to be rotated about a first axis to generate an airflow and a cylindrical smaller duct surrounding the fan about the first axis and extending in a first axis direction; and a cylindrical larger duct extending in a second axis direction parallel to the first axis. Each of the fan devices is arranged on an inner side of the ...