|322 / 44||-> 54||-> 55||-> 56|
uspto searchesPatent Apps in 322/54
Granted Patents in 322/54
Advanced search in patft or appft for the hierarchy would be:
(ccl/322/54 or ccl/322/55 or ccl/322/56)
Press the Search button below to send the query to the USPTO site. (Granted patents search)
This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.