Hierarchy/Derived subclasses
D20 / 10 | -> 11 | |||||
-> 12 | -> 4 | |||||
-> 13 | -> 14 | |||||
-> 15 | ||||||
-> 16 | ||||||
-> 17 | ||||||
-> 18 | -> 5 | |||||
-> 19 | -> 20 | |||||
-> 21 | ||||||
-> 22 | -> 6 | -> 23 | -> 24 | -> 25 | ||
-> 26 | ||||||
-> 27 | ||||||
-> 28 | ||||||
-> 29 | -> 30 | -> 31 | -> 7 | -> 32 | -> 33 | |
-> 34 | ||||||
-> 35 | ||||||
-> 36 | ||||||
-> 37 | ||||||
-> 38 | ||||||
-> 39 | ||||||
-> 40 | -> 8 | |||||
-> 41 | -> 9 | |||||
-> 42 | ||||||
-> 43 | -> 44 |
uspto searches
Patent Apps in D20/10Granted Patents in D20/10
Use the links above or do an advanced search in ppubs for:
(D20/10.ccls. or D20/11.ccls. or D20/12.ccls. or D20/4.ccls. or D20/13.ccls. or D20/14.ccls. or D20/15.ccls. or D20/16.ccls. or D20/17.ccls. or D20/18.ccls. or D20/5.ccls. or D20/19.ccls. or D20/20.ccls. or D20/21.ccls. or D20/22.ccls. or D20/6.ccls. or D20/23.ccls. or D20/24.ccls. or D20/25.ccls. or D20/26.ccls. or D20/27.ccls. or D20/28.ccls. or D20/29.ccls. or D20/30.ccls. or D20/31.ccls. or D20/7.ccls. or D20/32.ccls. or D20/33.ccls. or D20/34.ccls. or D20/35.ccls. or D20/36.ccls. or D20/37.ccls. or D20/38.ccls. or D20/39.ccls. or D20/40.ccls. or D20/8.ccls. or D20/41.ccls. or D20/9.ccls. or D20/42.ccls. or D20/43.ccls. or D20/44.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.