United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 831
the other groove by a plurality 75of convolutions of the latter and said recordalso having its b.ore tapered from each endtoward its center whereby the same may bereversibly mounted on a holder in order toseat a style in the starting- end of either 80groove. In testimony whereof, I affix my… … 3vM>C/wtot^
Phonograph · Patents
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