Hierarchy/Derived subclasses
554 / 1 | -> 7 | -> 2 | -> 3 | -> 124 | -> 161 | -> 162 | |||
-> 163 | -> 164 | ||||||||
-> 165 | -> 166 | ||||||||
-> 167 | -> 168 | ||||||||
-> 169 | |||||||||
-> 170 | -> 171 | ||||||||
-> 172 | -> 173 |
uspto searches
Patent Apps in 554/161Granted Patents in 554/161
Use the links above or do an advanced search in ppubs for:
(554/161.ccls. or 554/162.ccls. or 554/163.ccls. or 554/164.ccls. or 554/165.ccls. or 554/166.ccls. or 554/167.ccls. or 554/168.ccls. or 554/169.ccls. or 554/170.ccls. or 554/171.ccls. or 554/172.ccls. or 554/173.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.