(under the class definition) Apparatus in which the shape, composition or construction of an impeller blade* is specifically recited in a claim.
(1) Note. Patents from Class 415, Rotary Kinetic Fluid Motors or Pumps, subclasses 182.1 and 208.1 - 232, have been cross referenced to this and indented subclasses where particular runner blade structure is claimed. To complete a search for blade shapes, structures, materials, attaching means, etc., appropriate subclasses in Class 415 excepting those noted above, should be considered.
SEE OR SEARCH CLASS
428, Stock Material or Miscellaneous Articles,
544+, for stock materials, e.g., of indefinite length, which are all metal or have adjacent metal components.
