|D8 / 14||-> 33||-> 40||-> 41||-> 42|
uspto searchesPatent Apps in D8/40
Granted Patents in D8/40
Advanced search in patft or appft for the hierarchy would be:
(ccl/D8/40 or ccl/D8/41 or ccl/D8/42 or ccl/D8/43)
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.