As we all know, Edison had more than 2,000 inventions and 1500 patents in his life, and was known as the "king of inventions". Edison electric light company was founded in 1878, which has had a far-reaching impact on human life all over the world. He actively promoted and applied electric light, popularized electric current into the lives of ordinary people, changed the way of life of human beings and provided great convenience for human beings. His contribution to mankind is enormous.
But he is not as bright as the electric light.
"Edison invented the electric light" is common sense. But in fact, he only owns the patent right of electric light. As early as 1879, before Edison announced the invention of the electric light, two engineers had invented the electric light successively. However, due to their weak patent awareness, Edison did not apply for a patent in time, which made Edison take advantage of the loophole and came from behind.
In other words, Edison didn't "invent" the light bulb, but he "improved" it. Edison used other people's inventions to create a business card for himself, which is the most familiar to future generations.
If you pay a little attention to Edison on the Internet, another name "Tesla" will definitely appear. He is a very great scientist in human history and bears a grudge against Edison.
Twenty-four inventions of Tesla, which worked under Edison, were all appropriated by Edison. Later, in order to attack the alternating current invented by Tesla, Edison even found stray animals to be electrocuted alive, telling everyone that this is the harm of alternating current. Edison tried every means to suppress Tesla and even spread rumors.