• Born date: 1877-02-14
  • Born in: n.a.
  • Death date: 1956-01-08
Greenleaf Whittier Pickard

Greenleaf Whittier Pickard (February 14, 1877, Portland, Maine- January 8, 1956, Newton, Massachusetts) was a United States radio pioneer. Pickard was a researcher in the early days of wireless. He was responsible for the development of the crystal detector, (cat's whisker detector), a radio wave detector which was the central component in early radio receivers called crystal radios, which were the most widely used radio receivers until about 1920 and continued to be used until World War 2.