Hierarchy/Derived subclasses
977 / 840 | -> 882 | -> 884 | -> 885 |
uspto searches
Patent Apps in 977/885Granted Patents in 977/885
Use the links above or do an advanced search in ppubs for:
(977/885.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.