United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 712
No. 689,117. Patented Dec. 17, 1901. A. N. PETIT. DUPLICATE SOUND RECORD CYLINDER FOR PHONOGRAPHS. (Application filed Mar. 18, 1901. ^ (No Model.) … - - ^ CUCf> , PHOTO-LITHO.. WASHINOTON. O (
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from [Graphophone patents], 1878, leaf 712](https://img.insideoutlibrary.com/img/1024/ia-graphophonepaten04unit-712-0.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-831-559.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-162-65.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-184-71.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-1215-625.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten06unit-398-0.webp)
