USPC Class Details

Description: 128 surgery / 128 surgery/(200.24) respiratory method or device (205.27) means for removing substance from respiratory gas (205.29) particulate filtering (206.12) face mask covering a breathing passage (206.18) covering nose only

Hierarchy/Derived subclasses

128 / 200.24-> 205.27-> 205.29-> 206.12-> 206.18

uspto searches

Patent Apps in 128/206.18

Granted Patents in 128/206.18

Use the links above or do an advanced search in ppubs for:
(128/206.18.ccls.)

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.
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