Hierarchy/Derived subclasses
137 / 803 | -> 814 | -> 815 | -> 816 | -> 817 | |
-> 818 | |||||
-> 819 | -> 820 | -> s | |||
-> 821 |
uspto searches
Patent Apps in 137/814Granted Patents in 137/814
Use the links above or do an advanced search in ppubs for:
(137/814.ccls. or 137/815.ccls. or 137/816.ccls. or 137/817.ccls. or 137/818.ccls. or 137/819.ccls. or 137/820.ccls. or 137/s.ccls. or 137/821.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.