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Leonard Michael Greene
Leonard Greene holds
patents on dozens of inventions in aviation technology -- most notably, a device
that warns pilots when they are in danger of experiencing a deadly aerodynamic
Born in New York City in 1918, Greene received his B.S. and M.S. degrees in
civil engineering from City University of New
York. During World War II, young Greene joined the Grumman
Aircraft Corporation as an aerodynamicist and engineering test pilot. While
working there he was distressed to witness an aircraft accident caused by a
stall. After some analysis he realized such a terrible event could occur if
the pilot could not tell when the angle of airflow over a wing became excessive.
At the time, more than half of all aviation deaths were caused by the stall/spin.
Greene set to work to create a stall-warning device that would help prevent
such accidents. The result of his work brought him his first of more than 100
patents to date, 60 of which cover aviation technology. His Stall Warning Indicator
received the Flight Safety Foundation's first Air Safety Award and is found
in all aircraft today. A Saturday Evening Post article published in 1947 said
of Greene's innovation, "It may be the greatest life saver since invention of
In 1946, Greene established the Safe Flight Instrument Corporation in White
Plains, New York which manufactures and markets the stall warning system. Soon
Greene added more of his inventions to the product line, including a wind-shear
warning system that warns a pilot if an aircraft enters a dangerous microburst
and provides escape guidance. Today the firm supplies unique air safety and
performance technology to virtually every major air carrier, the U.S. Armed
Forces, and to aircraft manufacturers worldwide.
In addition to his achievements in the field of aviation safety, Greene's
innovations have also included devices designed to enhance performance of America's
Cup yachts, "visible speech" for the hearing impaired, a formula for linking
color and sound, and bilingual film "sound titling." He has also made his mark
as a social activist, having designed a plan to transform the federal social
budget to provide greater income security, middle class tax relief, and market
incentives for productivity growth.
Since 1974, Greene has been president of the Institute
for Socioeconomic Studies in White Plains. He has written several books,
including "Free Enterprise Without Poverty," and a number of articles on socioeconomic
issues. Greene also co-founded the Corporate
Angel Network, which makes corporate planes available to transport cancer
patients free of charge to and from distant hospitals. Greene established the
Chain Scholarship Foundation as well, a program for college seniors who pledge
to repay their scholarships for the benefits of future college seniors. In 1977
he was awarded an honorary doctorate by Pace University.
In addition to his work for ISS, Greene also remains President of the Safe
Flight Instrument Corporation. He continues to develop new patents and new ideas
in his "spare time."