Hierarchy/Derived subclasses
977 / 902 | -> 932 | -> 936 | -> 938 | -> fets |
uspto searches
Patent Apps in 977/938Granted Patents in 977/938
Use the links above or do an advanced search in ppubs for:
(977/938.ccls. or 977/fets.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.