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Template:Early evolution of the light bulb

Irving LangmuirWilliam David CoolidgeFranjo HanamanThomas EdisonThomas EdisonLewis Howard LatimerHiram MaximThomas EdisonHenry WoodwardJoseph Wilson SwanFrederick de MoleynsWarren De la RueJames Bowman LindsaySir Humphry DavySir Humphry Davy
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