Lee 1925
Frederick W. Lee, Owing Mills, Maryland. "Apparatus for and Method of Reproducing Sound". Filed: May 2, 1925 U.S. Patent 1,622,039 Granted: March 22, 1927

Lee 1925

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Filed: May 2, 1925
U.S. Patent 1,622,039
Granted: March 22, 1927

Frederick W. Lee, Owing Mills, Maryland.
"Apparatus for and Method of Reproducing Sound".

Referenced by Walker and Williamson in U.S. Pats. 3,008,013 & 3,008,014.