National Museum of American History
Edison "Stopper" lamp
Edison, Thomas Alva · 1881
A model to accompany the application for US Patent #239373, "Electric Lamp," filed 7 August 1880, issued 29 March 1881 to Thomas A. Edison. A hard rubber base-collar, single-arch bamboo filament with two-piece leads, platinum-clamps. Tipped, G-shaped envelope with neck.
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