# Tesla is granted U.S. Patent 454,622 for a high-frequency lighting system later called the Tesla coil

Date: 1891

## The fact

On 23 June 1891 the United States issued Patent 454,622 to [Tesla](/people/nikola-tesla) for a system of electric lighting using high-frequency currents and a resonant transformer. The apparatus is later called a Tesla coil. This Fact is the patent, not wireless power for cities.

Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23).

## Context

The 1891 AIEE high-frequency lecture is adjacent. Radio as a commercial service is later and shared with Lodge, Marconi and others. Do not upgrade a lighting-coil patent into a global power grid.

Nikola Tesla is not the sole author of every later object, law, or museum label that uses the name. Shared work with courts, excavators, printers, spouses, officials, and later states does not erase a documented role, and it does not make an ancient person the signer of a twentieth-century statute.

## Evidence and sources

The patent is a federal instrument. IEEE/ETHW independently describes Tesla’s high-frequency transformer work of the early 1890s.

Official or archival record: U.S. Patent 454,622 — System of Electric Lighting (1891) (https://patents.google.com/patent/US454622A; United States Patent and Trademark Office / Google Patents).

## Significance

Knowledge-instrument path.

A resonant transformer is not Wardenclyffe. Keep the later tower on its own row.

## What is established and what is not

Established: U.S. Patent 454,622 on 23 June 1891. Not established: that the coil already transmitted usable power without wires at utility scale.

What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions.

The date is the date of this instrument, not a licence to back-date every later harm or benefit.
Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23). Patent 454,622 for a high-frequency lighting system later called the Tesla coil (1891-06-23).

## People

- Nikola Tesla: https://factrail.ai/people/nikola-tesla

## Drivers

- Digital Learning Access: https://factrail.ai/drivers/edu-digital-learning-access

## Sources

- https://patents.google.com/patent/US454622A
- https://ethw.org/Nikola_Tesla

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/us-tesla-coil-patent-1891