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Production of Sound Records : specifications forming part of Letters Patent No. 688,739, dated 1901 December 10

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Production of Sound Records : specifications forming part of Letters Patent No. 688,739, dated 1901 December 10

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Summary

"Joseph W. Jones of New York, N.Y. assignor to himself, and Joseph A. Vincent, of Philadelphia, Pennsylvania.
Diagram and specifications detailing Joseph Jones' improvements in the production of sound records.

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Date

01/01/1901
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Source

Library of Congress
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Public Domain

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