United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 327
e combination of a phonograph re-corder or reproducer and a diaphragm sup-ported thereby, substantially as described. 6. The combination of a phonograph re-corder or reproducer and a diaphragm sup-ported thereby and having a weight at its pe-riphery, substantially as described. This specification…
Phonograph · Patents
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