Hierarchy/Derived subclasses
D3 / 18 | -> 20 | -> 21 | -> 22 | |
-> 23 | -> 24 | -> 25 | ||
-> 26 | ||||
-> 27 | ||||
-> 28 | ||||
-> 29 |
uspto searches
Patent Apps in D3/18Granted Patents in D3/18
Use the links above or do an advanced search in ppubs for:
(D3/18.ccls. or D3/20.ccls. or D3/21.ccls. or D3/22.ccls. or D3/23.ccls. or D3/24.ccls. or D3/25.ccls. or D3/26.ccls. or D3/27.ccls. or D3/28.ccls. or D3/29.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.