A lot has happened in the field of Tesla’s free energy machine since 1920. Theories about ZERO POINT ENERGY have been bandied about. Numerous claims have been made that free energy or overunity machines are working. The entire possibility of there being available free electricity in space has been shrouded in controversy. There have been numerous reports of a Tesla machine being reconstructed and patented; with several actually built and tested, as the one in use in Switzerland.