USPC 244/25

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USPC 244/25 is a patent technology class for Airships with sustaining wings -- Propelled aeronautical machines sustained by their buoyancy relative to the air, having also provision for sustentation by aerodynamic action on airfoils in fixed relation to the machines..[1]

Tech class tree:[2]

  • USPC 244/24: LIGHTER-THAN-AIR AIRCRAFT: Miscellaneous aircraft which ordinarily have a total weight less than or equal to that of the volume of air which they displace and are therefore sustained by their buoyancy with respect to the air.
    • USPC 244/25: Airships with sustaining wings. Propelled aeronautical machines sustained by their buoyancy relative to the air, having also provision for sustentation by aerodynamic action on airfoils in fixed relation to the machines. In this subclass the machines are primarily lighter-than-air craft with the fixed sustaining airfoils providing additional sustentation. Machines which are primarily airplanes but have provision for carrying some lighter-than-air gas to diminish their weight are found in USPC 244/5.

References

  1. ↑ https://www.uspto.gov/web/patents/classification/uspc244/defs244.htm#C244S025000
  2. ↑ https://www.uspto.gov/web/patents/classification/uspc244/defs244.htm#C244S024000

This wiki has 26 patents in category "USPC 244/25".

Patents in category USPC 244/25

Enclosing categories USPC 244/24
Subcategories
Keywords LTA
Start year
End year
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