Vogt 1928
Hans Vogt of Berlin-Wilmersdorf, Germany. "Sounding Condenser" Filed: Sept. 15, 1928 U.S. Patent 1,881,107 Granted: Oct. 4, 1932

Vogt 1928

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Filed: Sept. 15, 1928
U.S. Patent 1,881,107
Granted: Oct. 4, 1932

Hans Vogt of Berlin-Wilmersdorf, Germany.
"Sounding Condenser"

Referenced by Walker and Williamson in U.S. Pat. 3,008,013. Also ref: GB Patent 322,744 with 17 claims, granted December 10, 1929