Hierarchy/Derived subclasses
523 / 1 | -> 139 | -> 140 | |
-> 141 | |||
-> 142 | -> 143 | ||
-> 144 | |||
-> 145 | -> 146 | ||
-> 147 | |||
-> 148 |
uspto searches
Patent Apps in 523/139Granted Patents in 523/139
Use the links above or do an advanced search in ppubs for:
(523/139.ccls. or 523/140.ccls. or 523/141.ccls. or 523/142.ccls. or 523/143.ccls. or 523/144.ccls. or 523/145.ccls. or 523/146.ccls. or 523/147.ccls. or 523/148.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.