Hierarchy/Derived subclasses
| 270 / 1.01 | -> 4 | -> 5.01 | -> 6 | -> 7 |
| -> 8 | -> 9 | |||
| -> 5.02 | -> 5.03 | |||
| -> 10 | -> 11 | |||
| -> 12 | -> 13 | -> 14 | ||
| -> 15 | ||||
| -> 16 | ||||
| -> 17 |
uspto searches
Patent Apps in 270/4Granted Patents in 270/4
Use the links above or do an advanced search in ppubs for:
(270/4.ccls. or 270/5.01.ccls. or 270/6.ccls. or 270/7.ccls. or 270/8.ccls. or 270/9.ccls. or 270/5.02.ccls. or 270/5.03.ccls. or 270/10.ccls. or 270/11.ccls. or 270/12.ccls. or 270/13.ccls. or 270/14.ccls. or 270/15.ccls. or 270/16.ccls. or 270/17.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.