Top IPC subclasses
|
1
|
C02F
|
3
|
Treatment of water, waste water, sewage, or sludge
|
|
2
|
B01J
|
3
|
Chemical or physical processes, e.g. catalysis, colloid chemistry; their relevant apparatus
|
|
3
|
A01C
|
2
|
Planting; sowing; fertilising
|
|
4
|
C01B
|
2
|
non-metallic elementscompounds thereof
|
|
5
|
A61D
|
2
|
veterinary instruments, implements, tools, or methods
|
|
6
|
G01N
|
2
|
Investigating or analysing materials by determining their chemical or physical properties
|
|
7
|
B01D
|
1
|
Separation
|
|
8
|
B09B
|
1
|
disposal of solid waste
|
|
9
|
C01G
|
1
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
10
|
C12N
|
1
|
Micro-organisms or enzymes; compositions thereof; propagating, preserving, or maintaining micro-organisms; mutation or genetic engineering; culture media
|