Top IPC subclasses
1
|
A01C
|
4
|
Planting; sowing; fertilising
|
2
|
B24B
|
3
|
machines, devices, or processes for grinding or polishingdressing or conditioning of abrading surfac
|
3
|
G01N
|
1
|
Investigating or analysing materials by determining their chemical or physical properties
|