Hierarchy/Derived subclasses
977 / 700 | -> 813 | -> 815 | -> 821 |
uspto searches
Patent Apps in 977/821Granted Patents in 977/821
Use the links above or do an advanced search in ppubs for:
(977/821.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.