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Tesla: “Art of transmitting electrical energy through the natural mediums”, U.S. Patent 787 412, Apr. 18, 1905, Appl. May 16, 1900, P-331.
Tesla: “Art of transmitting electrical energy through the natural mediums”, U.S. Patent 787 412, Apr. 18, 1905, Appl. May 16, 1900, P-331.