Walker 1970
Peter James Walker of Huntingdon, England. "Electrostatic Loudspeaker with Constant Current Drive" Filed: November 3, 1970 U.S. Patent 3,773,984 Granted: November 20, 1973

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Filed: November 3, 1970
U.S. Patent 3,773,984
Granted: November 20, 1973

Peter James Walker of Huntingdon, England.
"Electrostatic Loudspeaker with Constant Current Drive"