Hierarchy/Derived subclasses
473 / 131 | -> 219 | -> 221 | -> 223 | -> 224 |
uspto searches
Patent Apps in 473/223Granted Patents in 473/223
Use the links above or do an advanced search in ppubs for:
(473/223.ccls. or 473/224.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.