Hierarchy/Derived subclasses
| 70 / 266 | -> 336 | -> 344 | -> 348 | -> 357 | -> 490 | -> 491 | -> 492 | -> 493 | -> 494 |
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uspto searches
Patent Apps in 70/491Granted Patents in 70/491
Use the links above or do an advanced search in ppubs for:
(70/491.ccls. or 70/492.ccls. or 70/493.ccls. or 70/494.ccls. or 70/495.ccls. or 70/496.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.