Thomas Edison's Patent Application for the Light Bulb
Thomas Edison's Patent Application for the Light Bulb
Thomas Edison's patent drawing for an improvement in electric lamps, patented January 27, 1880; Records of the Patent and Trademark Office; Record Group 241; National Archives.
On January 27, 1880, Thomas Edison received the historic patent embodying the principles of his incandescent lamp that paved the way for the universal domestic use of electric light.