Kellogg 1929

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Filed: Sept. 27, 1929
G.B. Patent 346,646
Granted: April 16, 1931

Edward Washburn Kellogg, Schenectady, N.Y. assigned rights to General Electric Co. N.Y.
"Production of Sound"

Indirectly Referenced by Walker and Williamson in U.S. Pats. 3,008,013