Hierarchy/Derived subclasses
| 144 / 50 | -> 51 | ||
| -> 52 | -> 53 | ||
| -> 54 | -> 55 | -> 56 | |
| -> 57 | |||
| -> 58 | |||
| -> 59 | |||
| -> 60 | |||
| -> 61 | |||
| -> 65 | -> 62 | ||
| -> 63 | -> 64 | ||
| -> 66 |
uspto searches
Patent Apps in 144/50Granted Patents in 144/50
Use the links above or do an advanced search in ppubs for:
(144/50.ccls. or 144/51.ccls. or 144/52.ccls. or 144/53.ccls. or 144/54.ccls. or 144/55.ccls. or 144/56.ccls. or 144/57.ccls. or 144/58.ccls. or 144/59.ccls. or 144/60.ccls. or 144/61.ccls. or 144/65.ccls. or 144/62.ccls. or 144/63.ccls. or 144/64.ccls. or 144/66.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.