U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 733
therewith to turn the same, thepapor receiving roll and paper connecting10 said rolls, in combination with transverse perforated bars through which the paper isfed, and puncturing wires or rods operatingthrough said perforated bars, substantially asdescribed. Witness my hand to the foregoing… … FvcjS.
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-789-358.webp)
