United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 909
F/g.Z … THE NORRIS PETFKS CO., WASHIHOTOH. O. C No. 852,647. PATENTED MAY 7, 1907. L. I. BLAKE.SUBMARINE SIGNALING. APPLICATION FILED JAH. 8, 1907. 2 SHEETS-SHEET 2.
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents], 1878, leaf 909](https://img.insideoutlibrary.com/img/1024/ia-graphophonepaten07unit-909-587.webp)
