Did Edison really invent the light bulb?

Edison applied for the patent of American electric light bulb in 1876, but he only used the research results of Canada. He bought half of the patents from James Woodward, a Toronto medical electronics expert. Woodward and his colleague Matthew Evans applied for a light bulb patent on July 24th with the application number 1874. Woodward and his colleagues made the first light bulb at Morrison Brass Foundry in San Jose, Adelaide, Toronto. It 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 and make their results market-oriented, but with little success. Where did the federal government go when you needed it? Finally, Woodward sold half of his Canadian patents to Edison. 1876, Woodward obtained the American patent for electric light bulb; 1879, Edison bought all the patents from Woodward, Evans and all other Canadian partners. Since then, the light bulb has become an American. Note: The electric light bulb invented by Edison usually refers to "durable light bulb", not the earliest invented light bulb.