Nikola Tesla British Patent 13,563 - Improvements in, and Relating to, the Transmission of Electrical Energy
Nikola Tesla U.S. Patent 568,178 - Method of Regulating Apparatus for Producing Electric Currents of High Frequency
Nikola Tesla German Patent 139464 - Method and Device for the Utilization of Electrical Impulses or Vibrations Sent from a Distance by the Ether or the Earth or Both
