Hierarchy/Derived subclasses
277 / 345 | -> 500 | -> 549 | -> 553 | -> 554 |
-> 555 | ||||
-> 556 | ||||
-> 557 | ||||
-> 558 |
uspto searches
Patent Apps in 277/553Granted Patents in 277/553
Use the links above or do an advanced search in ppubs for:
(277/553.ccls. or 277/554.ccls. or 277/555.ccls. or 277/556.ccls. or 277/557.ccls. or 277/558.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.