Nikola Tesla British Patent 16,709 - Improvements Relating to the Conversion of Alternating into Direct Electric Currents
Nikola Tesla British Patent 19,426 - Improvements in the Construction and Mode of Operating Alternating Current Motors
Nikola Tesla German Patent 66802 - AC Driving Machine with Main and Auxiliary Magnets Acting on a Self-Contained Armature Winding
Nikola Tesla Canadian Patent 33317 - Improvements in Methods and Apparatus for Converting Alternating into Direct Currents