Hierarchy/Derived subclasses
521 / 50 | -> 186 | -> 187 | -> 188 |
uspto searches
Patent Apps in 521/187Granted Patents in 521/187
Use the links above or do an advanced search in ppubs for:
(521/187.ccls. or 521/188.ccls.)
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.