USPC 244/22

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U.S. patent classification subclass 244/22 is for patents related to sustained beating wings, that is, ornithopters: Aeronautical machines sustained by the downward thrust developed by flapping or reciprocating blades attached to the machines. These blades may also be the propelling agents.[1]

Related classes

  • For machines having fixed sustaining airfoils as well as beating wings, see USPC 244/11[1]
  • For lighter-than-air craft sustained also by beating wings, see USPC 244/28[1]
  • For beating wings, per se, see this class, USPC 244/72[1]


  1. 1.0 1.1 1.2 1.3 Description of category USPC 244/22 at

See also

Patents in category USPC 244/22
Enclosing categories USPC 244/4
Keywords flapping, ornithopter
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