USPC Class Details

Description: D19 office supplies; artists and teachers materials / d19 office supplies; artists and teachers materials/(101) equipment for writing, drawing, or for fine arts (190) refill cartridge

Hierarchy/Derived subclasses

D19 / 101-> 190

uspto searches

Patent Apps in D19/190

Granted Patents in D19/190

Advanced search in patft or appft for the hierarchy would be:

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.