Hierarchy/Derived subclasses
| 74 / 813r | -> 814 | ||||
| -> 815 | |||||
| -> 816 | -> 817 | -> 818 | |||
| -> 819 | |||||
| -> 820 | |||||
| -> 821 | |||||
| -> 822 | -> 823 | -> 824 | |||
| -> 825 | |||||
| -> 826 | |||||
| -> 827 | |||||
| -> 813c | |||||
| -> 813l |
uspto searches
Patent Apps in 74/813RGranted Patents in 74/813R
Use the links above or do an advanced search in ppubs for:
()
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.