Hierarchy/Derived subclasses
D28 / 9 | -> 73 | -> 19 | -> 76 | -> 3 | -> 85 | -> 88 | -> 89 |
-> 90 |
uspto searches
Patent Apps in D28/88Granted Patents in D28/88
Use the links above or do an advanced search in ppubs for:
(D28/88.ccls. or D28/89.ccls. or D28/90.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.