United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 601
imitsof the conductor, substantially as described. 3. A hollow conductor for sound record-ing and reproducing machines the outer wall 50of which is formed of a sound absorbing ma-terial, substantially as described. In testimony whereof^ I have signed myname to this specification in the presence… … A///////////////////////////////////////////////////7777777777^ f IQ 3 Kttest #*?v^fff^
Phonograph · Patents
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