- All sections
- C - Chemistry; metallurgy
- C02F - Treatment of water, waste water, sewage, or sludge
- C02F 9/02 - Multistep treatment of water, waste water or sewage involving a separation step
Patent holdings for IPC class C02F 9/02
Total number of patents in this class: 410
10-year publication summary
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29
|
28
|
33
|
33
|
41
|
30
|
49
|
20
|
1
|
0
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