ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,391,403, issued on Aug. 19.
"Aircraft take-off and landing device" was invented by Chunshan Yang (Liaoning, China) and Xuanjia Wang (Liaoning, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An aircraft take-off and landing comprises two first rollers installed on the runway for the front and rear wheels of an aircraft; a take-off groove is arranged between the two first rollers, first bearings are installed on both sides of the first roller, a gear is installed on the outer ring of the first bearing, the lower part of the gear on one side is meshedly connected with a first large gear, the first large gear is driven by a first motor; the rear sides...