The Passing Of Leonard Greene

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Founder of Safe Flight Instrument Corp., inventor of the stall warning indicator in 1946, co-founder of the Corporate Angel Network, test pilot and engineer, Leonard Greene, died last Thursday of cancer at the age of 88. Greene’s Safe Flight Instrument Corp. sold more than half a million stall warning indicators and other flight safety devices, his Corporate Angel Network made nearly 25,000 flights using empty seats on corporate jets to facilitate travel free of charge for cancer patients. Greene invented devices that link sound and color to help the blind, created a system for “visible speech” for the hearing impaired and held some 60 patents in aviation. Strongly involved in invention, philanthropy and aviation, Greene lost a son and business partner, Donald, on United Airlines Flight 93 when it crashed in a field in Shanksville, Pennsylvania, on September 11, 2001.

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