Mathew Evans
Encyclopedia : M : MA : MAT : Mathew Evans
Mathew Evans is one of two Canadians who developed and patented the first incandescent light bulb, on July 24, 1874, five years before Thomas Edison's U.S. patent on the device.
Evans, from Toronto, Ontario, and his friend Henry Woodward, made the lightbulb by sending electricity through a filament made of carbon. Modern incandescent light bulbs still work the same way.
The two men patented it but did not have enough money to develop their invention, so they sold their US patent 181,613 to Thomas Edison for US$5,000 ($US 100,000 in 2006 dollars). They also granted Edison and exclusive license to their equivalent Canadian patent.
External links
From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.