Hierarchy/Derived subclasses
438 / 142 | -> 167 | -> 168 | |||
-> 169 | |||||
-> 170 | |||||
-> 171 | |||||
-> 172 | |||||
-> 173 | |||||
-> 174 | |||||
-> 175 | |||||
-> 176 | |||||
-> 177 | |||||
-> 178 | |||||
-> 179 | |||||
-> 180 | -> 181 | -> 182 | |||
-> 183 | |||||
-> 184 | -> 185 |
uspto searches
Patent Apps in 438/167Granted Patents in 438/167
Use the links above or do an advanced search in ppubs for:
(438/167.ccls. or 438/168.ccls. or 438/169.ccls. or 438/170.ccls. or 438/171.ccls. or 438/172.ccls. or 438/173.ccls. or 438/174.ccls. or 438/175.ccls. or 438/176.ccls. or 438/177.ccls. or 438/178.ccls. or 438/179.ccls. or 438/180.ccls. or 438/181.ccls. or 438/182.ccls. or 438/183.ccls. or 438/184.ccls. or 438/185.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.