Patent Drawing for T. A. Edison's Incandescent Electric Lamp - NARA - 6277646.jpg
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Patent Drawing for T. A. Edison's Incandescent Electric Lamp NARA 6277646, Patent drawings in the National Archives and Records Administration, US National Archives series: Utility Patent Drawings, Images from the National Archives and Records Administration, US National Archives location: other, NARA-Author with ARC, Patent Drawing for T. A. Edison's Incandescent Electric Lamp
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T.A.エジソンの白熱電灯 NARA 6277646、米国国立公文書館管理局の特許図面、米国国立公文書館のUtility Patent Drawings、米国国立公文書館管理局の画像、米国国立公文書館の場所、NARA-Author with ARC、T.A.エジソンの白熱電灯用特許図面
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arc lamp electric lamp incandescent patent law patent patent right incandescent light bulb patency patented