In 1891, of course!
1856
in 1878
he didn't
in 1880
1879
it took him 1 year to invent the lightbulb
He invented the electric light in 1880
Edison invented the minor's safety lamp in the year 1914.
December 31, 1879
Around 1880
The process sound recording on a tin wrapped cylinder was invented in 1877
Thomas Edison invented the light bulb 1876 an the camera 1890