Hierarchy/Derived subclasses
454 / 196 | -> 214 | -> 216 | -> 217 | -> 218 |
-> 219 | ||||
-> 220 |
uspto searches
Patent Apps in 454/216Granted Patents in 454/216
Use the links above or do an advanced search in ppubs for:
(454/216.ccls. or 454/217.ccls. or 454/218.ccls. or 454/219.ccls. or 454/220.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.