Miniature airplane adapted to be forcibly ejected into flight from a tube, by air pressure (Adriano Bissiri, US Patent, August 5, 1930)

Adriano Bissiri: Guns for launching the missile with the force of the breath only. The configuration ranges from a simple tube with a mouthpiece at the end, a tube with an appendix offset from the tube's axis carrying the mouthpiece or a tube with a mouthpiece attached at the end of a flexible tube.
Application filed April 25, 1928. Serial N0. 272,595.

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