Inside Out Library
[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 393
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in the form of ajewel of greater extent in the direction of thelength of the sound record groove than inthe direction of the width of tlie groove, andhaving a rounded edge adapted to be en- 85gaged by the propelling wall of the groove. In testimony that I claim the foregoing asmy own, I have hereto… … C^<y^- /©Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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