Light bulb patent.jpg
author}}
en
Light bulb patent, Inventors from Canada, Science and technology in Canada, Drawings of light bulbs, United States patent drawings
commons
en
Light bulb patent, Canadian patent #3738 (1874), Canadian Patent application
commons
ja
電球特許、カナダ出身の発明家、カナダの科学技術、電球の描画、米国特許図
commons_translated
ja
電球特許、カナダの特許#3738(1874)、カナダの特許出願
commons_translated
light bulb myelencephalon incandescent patent log medulla oblongata bulb incandescent light bulb medulla front light bulbed light source patency light year electric lamp patented