United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 115
aterial. 2. In a disk-blank for talking-machhies, arigid disk with multiple parallel volute spirals 50thereon, all but one of said volute spirals hav-ing therein a wax-like composition or recordmaterial. In testimony whereof I have signed myname to this specification, in the presence of 55two… … WW1- 9 ^ Jfy.2. attest: ^y
Phonograph · Patents
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