2nd edition, 2007
  • From 1893 to 1900 Fessenden was the first chairman of the newly-created department of electrical engineering at the University of Pittsburgh. He went on to invent the heterodyne method of radio transmission. Among his many other inventions is the fathometer, used on ships to determine water depth.
  • Here we list his 230 U.S. patents, first in chronological order, then in alphabetical order.

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