Nikola Tesla Canadian Patent 33317 - Improvements in Methods and Apparatus for Converting Alternating into Direct Currents
Nikola Tesla British Patent 186,083 - Improved Method of and Apparatus for the Economic Transformation of the Energy of Steam by Turbines
Nikola Tesla German Patent 139465 - Method and Device for the Utilization of Electrical Impulses or Vibrations Sent from a Distance by the Ether or the Earth or Both
