Hierarchy/Derived subclasses
| 135 / 15.1 | -> 16 | -> 17 | ||
| -> 18 | ||||
| -> 19 | ||||
| -> 19.5 | ||||
| -> 20.1 | ||||
| -> 20.2 | ||||
| -> 20.3 | ||||
| -> 21 | ||||
| -> 22 | -> 23 | |||
| -> 24 | ||||
| -> 25.1 | -> 25.2 | |||
| -> 25.3 | ||||
| -> 25.31 | -> 25.32 | |||
| -> 25.33 | ||||
| -> 25.34 | ||||
| -> 25.4 | -> 25.41 | |||
| -> 26 | ||||
| -> 27 | ||||
| -> 28 | ||||
| -> 29 | -> 30 | |||
| -> 31 | ||||
| -> 32 | ||||
| -> 33.2 | -> 33.4 | -> 33.41 | ||
| -> 33.5 | ||||
| -> 33.6 | ||||
| -> 33.7 | -> 33.71 | |||
| -> 34.2 | ||||
| -> 37 | -> 38 | -> 39 | ||
| -> 40 | -> 41 | |||
| -> 42 | ||||
| -> 43 | ||||
| -> 44 | ||||
| -> 48 |
uspto searches
Patent Apps in 135/15.1Granted Patents in 135/15.1
Use the links above or do an advanced search in ppubs for:
(135/15.1.ccls. or 135/16.ccls. or 135/17.ccls. or 135/18.ccls. or 135/19.ccls. or 135/19.5.ccls. or 135/20.1.ccls. or 135/20.2.ccls. or 135/20.3.ccls. or 135/21.ccls. or 135/22.ccls. or 135/23.ccls. or 135/24.ccls. or 135/25.1.ccls. or 135/25.2.ccls. or 135/25.3.ccls. or 135/25.31.ccls. or 135/25.32.ccls. or 135/25.33.ccls. or 135/25.34.ccls. or 135/25.4.ccls. or 135/25.41.ccls. or 135/26.ccls. or 135/27.ccls. or 135/28.ccls. or 135/29.ccls. or 135/30.ccls. or 135/31.ccls. or 135/32.ccls. or 135/33.2.ccls. or 135/33.4.ccls. or 135/33.41.ccls. or 135/33.5.ccls. or 135/33.6.ccls. or 135/33.7.ccls. or 135/33.71.ccls. or 135/34.2.ccls. or 135/37.ccls. or 135/38.ccls. or 135/39.ccls. or 135/40.ccls. or 135/41.ccls. or 135/42.ccls. or 135/43.ccls. or 135/44.ccls. or 135/48.ccls.)
At about 35 search terms the uspto will give you this error "Too many search terms" The 35th term is bold.
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.