Hierarchy/Derived subclasses
| D21 / 398 | -> 419 | -> 424 | -> 425 | ||
| -> 426 | |||||
| -> 427 | -> 428 | -> 429 | |||
| -> 430 | |||||
| -> 431 | |||||
| -> 432 | |||||
| -> 433 | -> 434 | ||||
| -> 435 |
uspto searches
Patent Apps in D21/424Granted Patents in D21/424
Use the links above or do an advanced search in ppubs for:
(D21/424.ccls. or D21/425.ccls. or D21/426.ccls. or D21/427.ccls. or D21/428.ccls. or D21/429.ccls. or D21/430.ccls. or D21/431.ccls. or D21/432.ccls. or D21/433.ccls. or D21/434.ccls. or D21/435.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.