Company here is the patent agent seeking to license a U. S. patent for prototyping and worldwide production. Company is a U. S patent holder looking to license manufacturers worldwide to produce engines in their own nation. There is a choice of 4 types of engines: piston, steam, stirling and fluidic. This engine makes renewable energy***practical***! ! ! It is more efficient than today's piston engines and saves petrol fuel. It has unique, patented hybrids that ramp up efficiency even more; using as much as 60-80% of the energy found in the fuel. Patented only in the USA, companies in other nations indicate willingness to pay royalties per engine, please.