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; 威尼斯人娱乐场.
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.