Smoke excluding mask patent,1877. Artwork of a smoke mask invented by George Neally to allow people to survive inside a smoke-filled environment such as a burning building. The mask includes moist sponges that filter out smoke particles | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / US Patent And Trademark Office |
Bildgröße: | 3533 px × 4998 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |