Template:Early evolution of the light bulb

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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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