Historedia
Episode 1 of 1

Patent Grant

When
1880-01-27
Where
Menlo Park
Part of
Thomas Edison granted a patent for the incandescent light bulb

Edison received U.S. Patent 223,898 for his incandescent lamp design on January 27, 1880.

The patent covered an electric lamp using a carbon filament or strip coiled and connected to platina contact wires. It was filed on November 4, 1879, and granted in January 1880, supporting Edison's commercial lighting system goals.

Sources

  1. Thomas Edison Wikipedia, revision of 2026-10-04

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.