Hierarchy/Derived subclasses
137 / 803 | -> 825 | -> 827 | -> 828 |
uspto searches
Patent Apps in 137/827Granted Patents in 137/827
Use the links above or do an advanced search in ppubs for:
(137/827.ccls. or 137/828.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.