Nikola Tesla British Patent 11,293 - Improvements Relating to the Utilization of Electromagnetic, Light, or Other Like Radiations Effects or Disturbances Transmitted through the Natural Media and to Apparatus Therefor
Nikola Tesla British Patent 24,421 - Improvements in Systems for the Transmission of Electrical Energy and Apparatus for Use Therein
Nikola Tesla Canadian Patent 142352 - Art of Transmitting Electrical Energy through the Natural Mediums
Nikola Tesla U.S. Patent 462,418 - Method of and Apparatus for Electrical Conversion and Distribution
