Hierarchy/Derived subclasses
81 / 300 | -> s | -> 385 | -> 407 | -> 408 | -> 409 | ||
-> 409.5 |
uspto searches
Patent Apps in 81/408Granted Patents in 81/408
Use the links above or do an advanced search in ppubs for:
(81/408.ccls. or 81/409.ccls. or 81/409.5.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.