The achievements of Edison were legendary. Starting as a tramp telegraphist, he had grown into a great inventor and businessman. This rags-to-riches success story has always caught the world’s imagination, and no wonder America looks at him as a folk hero.
It is not that all his inventions made a lot of money. Yet he built a huge business empire and employed thousands of assistants, engineers, machinists and researchers. He was not always an easy-going boss to his employees, and was ruthless to his rivals.
At the time of his death, his inventions were reported to have contributed about fifteen billion dollars to the national economy. He was a pioneer in the technological revolution of the modern a world.
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