The patent for the electric light bulb was sold to Thomas Edison when the inventor was a medical student. Which Canadian inventor patented it in 1874?

MonkeyOnALeash

" Edison did not invent the first electric light bulb, but instead invented the first commercially practical incandescent light. Several designs had already been developed by earlier inventors including the patent he purchased from Henry Woodward and Mathew Evans, Moses G. Farmer, Joseph Swan, James Bowman Lindsay, William Sawyer, Sir Humphry Davy, and Heinrich Göbel... In North America, parallel developments were also taking place. On July 24, 1874 a Canadian patent was filed for the Woodward and Evans Light by a Toronto medical electrician named Henry Woodward and a colleague Mathew Evans. They built their lamps with different sizes and shapes of carbon rods held between electrodes in glass cylinders filled with nitrogen. Woodward and Evans attempted to commercialize their lamp, but were unsuccessful. " http://en.wikipedia.org/wiki/Incandescent_light_bulb#Early_pre-commercial_research Nov 08 07, 8:12 AM