Top IPC subclasses
1
|
C02F
|
5
|
Treatment of water, waste water, sewage, or sludge
|
2
|
A61L
|
5
|
Methods or apparatus for sterilising materials or objects in general; disinfection, sterilisation, or deodorisation of air; chemical aspects of bandages, dressings, absorbent pads, or surgical articles; materials for bandages, dressings, absorbent pads, or surgical articles
|