Hierarchy/Derived subclasses
137 / 803 | -> 822 | -> 823 | -> 824 |
uspto searches
Patent Apps in 137/824Granted Patents in 137/824
Use the links above or do an advanced search in ppubs for:
(137/824.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.