Paul E. Williams (U.S. patent #3,065,933)
On November 26th, 1962, African American inventor, Paul E. Williams patented a helicopter, Lockheed Model 186 (XH-51). It was a compound experimental helicopter and only 3 units were built.
On November 26th, 1962, African American inventor, Paul E. Williams patented a helicopter, Lockheed Model 186 (XH-51). It was a compound experimental helicopter and only 3 units were built.
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