ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,686, issued on Nov. 3.

"Pneumatically actuated energy generator" was invented by Matthew David Marko (Seaside Heights, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of operating a mechanical heat engine according to an internally reversible thermodynamic cycle may comprise four piston-cylinders, with extending connecting rods of identical stroke lengths such that three of the piston-cylinder systems have an identical bore and the fourth cylinder has a smaller bore. According to such a method, the smaller-bore piston-cylinder is connected via the piston rod to an adjacent piston-cylinder with the rods fully extended one full stroke leng...