Hierarchy/Derived subclasses
494 / 23 | -> 27 | -> 28 |
-> 29 | ||
-> 30 |
uspto searches
Patent Apps in 494/27Granted Patents in 494/27
Use the links above or do an advanced search in ppubs for:
(494/27.ccls. or 494/28.ccls. or 494/29.ccls. or 494/30.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.