CA 244/7

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CA 244/7 is a Canadian patent category for heavier-than-air craft sustained in the air by airplane wings and auto-rotating (helicopter) "wings" (propellers).[1][2][3]

The first one of these that comes up in CIPO was issued in 1930.

References

  1. ↑ Subclasses of patent class CA 244
  2. ↑ Definition of subclass CA 244/7
  3. ↑ List of Canadian patents in subclass CA 244/7 filed before 1925

This wiki has 0 patents in category "CA 244/7". Other techtypes related to CA 244/7: USPC 244/8


Enclosing categories CA 244/3
Subcategories
Keywords Airplane, Airfoil, Propulsion, USPC 244/8
Start year
End year
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