Hierarchy/Derived subclasses
271 / 8.1 | -> 145 | -> 147 | -> 152 | -> 153 | |
-> 154 | -> 155 | ||||
-> 156 |
uspto searches
Patent Apps in 271/152Granted Patents in 271/152
Use the links above or do an advanced search in ppubs for:
(271/152.ccls. or 271/153.ccls. or 271/154.ccls. or 271/155.ccls. or 271/156.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.