Hierarchy/Derived subclasses
| 236 / 67 | -> 74r | -> 75 | |
| -> 76 | |||
| -> 77 | |||
| -> 78r | -> 78a | ||
| -> 78b | |||
| -> 78c | |||
| -> 78d | |||
| -> 74a |
uspto searches
Patent Apps in 236/74rGranted Patents in 236/74r
Use the links above or do an advanced search in ppubs for:
(236/74r.ccls. or 236/75.ccls. or 236/76.ccls. or 236/77.ccls. or 236/78r.ccls. or 236/78a.ccls. or 236/78b.ccls. or 236/78c.ccls. or 236/78d.ccls. or 236/74a.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.