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 (115) marking or writing instrument (163) including a cap (164) cap or barrel includes clip (165) short cap over tip only (166) clip extends below bottom edge of cap

Hierarchy/Derived subclasses

D19 / 101-> 115-> 163-> 164-> 165-> 166

uspto searches

Patent Apps in D19/166

Granted Patents in D19/166

Advanced search in patft or appft for the hierarchy would be:
(ccl/D19/166)

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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.
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