This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...
This patent model demonstrates an invention for a numbering machine, granted patent number 245220. The patent details a numbering machine in which blank spaces were filled by a character, such as a ...
当前正在显示可能无法访问的结果。
隐藏无法访问的结果