Rocket Motor Aeroplane by Louis Berkowitz

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(New page: U.S. Patent # 1.838,984 for Rocket Motor Aeroplane issued to Louis Berkowitz of New York on December 29, 1931. Filed Mar 20 1931)
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U.S. Patent # 1.838,984 for Rocket Motor Aeroplane issued to Louis Berkowitz of New York on December 29, 1931. Filed Mar 20 1931

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