ALEXANDRIA, Va., July 16 -- United States Patent no. 12,669,056, issued on June 30, was assigned to Shih-Ho Chang (Changhua City, Taiwan).
"Rotary steam engine" was invented by Shih-Ho Chang (Changhua City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotary steam engine includes: a stator mechanism including two stators forming a track therebetween; a rotor rotatably arranged between the stators and including cylinders and perorations open on an outer surface of the rotor and communicating with the cylinders; a mandrel disposed through the stator mechanism and the rotor; pistons respectively received in the cylinders and respectively including piston shafts movable along the track, an engine lubr...