Did Edison really invent the light bulb

In 1876, Edison applied for a patent for electric light bulb in the United States, but he only used the research results of Canadians. He bought half of the patent from James Woodward, a Toronto medical electronics expert. Woodward and his colleague Matthew Evans applied for a patent for the light bulb on July 24th, 1874. At Morrison Brass Foundry in Adelaide St. West, Toronto, Woodward and his colleagues made the first electric light bulb, which was a glass bulb filled with nitrogen, and the filament was a carbon rod, which connected the two ends of the electrode. At that time, Woodward and Evans were regarded as dreamers, and their inventions were laughed at by the public: "Who needs this shiny gadget!" " They tried to set up a company to raise funds to make their achievements market-oriented, but with little effect. Where did the federal government go when you needed it? In the end, Woodward sold half of his Canadian patent to Edison. In 1876, Woodward obtained the American patent for the electric light bulb, and in 1879, Edison bought all the patents from Woodward, Evans and all other Canadian partners. Since then, the light bulb has become an American. Note: Edison's invention of the electric light bulb usually refers to the "durable light bulb" rather than the earliest invented light bulb.