Nikola Tesla British Patent 2812 - Improvements in Methods of and Apparatus for the Generation of Electric Currents of Defined Period
Nikola Tesla U.S. Patent 568,176 - Apparatus for Producing Electrical Currents of High Frequency and Potential
Nikola Tesla British Patent 20,981 - Improvements Relating to the Production, Regulation, and Utilization of Electric Currents of High Frequency, and to Apparatus Therefor
