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Paul Williams - Helicopter design Figures 1 & 8

By Mary Bellis, About.com Guide

Paul Williams - Helicopter design

Paul Williams - Helicopter design Figures 1 & 8

USPTO

Paul Williams invented improvements to helicopter design and received patent #3,065,933 on 11/27/1962

12 of 17

Gallery Index: African American Patent Holders - T,U,V,W,X,Y,Z

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