Episode 2 of 3
Patent Filing
- When
- April 25, 1891
- Where
- Patent Office
Tesla patented the resonant transformer circuit on April 25, 1891, establishing the two-coil design as the standard.
The patent covered a resonant transformer circuit consisting of a primary winding for current pulses and a secondary winding for high voltage. This specific two-coil configuration was invented by Tesla in 1891 and remains the basis for virtually all present Tesla coils.
Sources
- Tesla coil Wikipedia, revision of 2026-10-10
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.