Filed: October 5, 1949
U.S. Patent 2,631,196
Granted: October 5, 1953
Arthur A. Janszen, Cambridge, Mass.
"Electrostatic Loud-Speaker"
Referenced by Walker and Williamson in U.S. Pats. 3,008,013 & 3,008,014.
Filed: October 5, 1949
U.S. Patent 2,631,196
Granted: October 5, 1953
Arthur A. Janszen, Cambridge, Mass.
"Electrostatic Loud-Speaker"
Referenced by Walker and Williamson in U.S. Pats. 3,008,013 & 3,008,014.
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