File:Gatty-Weems Speed & Drift Indicator Patent.jpg: Revision history

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30 November 2010

  • curprev 21:0121:01, 30 November 2010‎ Rickerjones talk contribs‎ 156 bytes +156‎ Harold Gatty and P.V.H. Weems collaborated on the "Speed and Drift Indicator" patented in 1934. Both men had numerous inventions relating to air navigation.
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