USPC Class Details

Description: D19 office supplies; artists and teachers materials / d19 office supplies; artists and teachers materials/(20) calendar or calendar holder (21) combined (22) with writing paper receptacle (3)

Hierarchy/Derived subclasses

D19 / 20-> 21-> 22-> 3

uspto searches

Patent Apps in D19/22

Granted Patents in D19/22

Advanced search in patft or appft for the hierarchy would be:
(ccl/D19/22 or ccl/D19/3)

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.