31. Edison was instrumental in creating which industry?
32. What was Thomas Edison’s middle name?
33. Thomas Edison’s light bulb was commercialized by which company?
34. How many patents did Thomas Edison hold?
35. Edison famously said what about genius?
36. What was the name of Edison’s famous laboratory?
37. What was Thomas Edison’s first major invention?
38. What is Thomas Edison’s nickname?
39. Where did Edison establish the world’s first industrial research lab?
40. Edison invented which of the following devices?
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