![]() ![]() ![]() The Greenes manufactured rubber cement, but poverty gripped the family during the Depression, and his father died when Leonard was 16. He even held a patent on three-dimensional chess. He also syndicated a World’s Cup racing yacht, founded an organization that distributed unused seats on corporate jets to needy cancer patients, and set several flight endurance records in his Beach King Air turbo prop.įorever tinkering, Greene came up with any number of inventions that made little money - an automatic voice translation system for foreign films, an audio method to help the blind to paint. Inspired, he said, by observing an earthworm, Greene patented a supersonic plane with a central air intake, a design element he claimed virtually eliminated the sonic boom.Ī man of wide interests and deep enthusiasms, Greene founded the libertarian Institute for SocioEconomic Studies to lobby for a favored project that he thought would create an economic renaissance: income tax rebates. Leonard Greene, who died November 30 at 88, used his experience as a wartime test pilot to invent the stall detector and other aircraft safety equipment, as well as more curious devices like the audible traffic light and a machine that automatically charges telemarketers for the opportunity to pitch their wares.
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