Thomas Edison's Patent Drawing for the Incandescent Electric Lamp - NARA - 17370170.jpg
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Thomas Edison's Patent Drawing for the Incandescent Electric Lamp NARA 17370170, US National Archives series: Utility Patent Drawings, Images from the National Archives and Records Administration, US National Archives location: other, Thomas Edison's Patent Drawing for the Incandescent Electric Lamp
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トーマス・エジソンの白熱電灯用特許図面 NARA 17370170、米国国立公文書館シリーズ: 特許図面、米国国立公文書館所蔵画像: トーマス・エジソンの白熱電灯用特許図面
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electric lamp incandescent incandescent light bulb patent law