Hierarchy/Derived subclasses
| D28 / 4 | -> 5 | -> 1 | -> 6 |
uspto searches
Patent Apps in D28/5Granted Patents in D28/5
Use the links above or do an advanced search in ppubs for:
(D28/5.ccls. or D28/1.ccls. or D28/6.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.