USPC Class Details

Description: 128 surgery / 128 surgery/(200.24) respiratory method or device (201.22) including body or head supported means covering user's scalp (201.23) and nose and mouth also covered

Hierarchy/Derived subclasses

128 / 200.24-> 201.22-> 201.23-> 201.24
   -> 201.25
   -> 201.26
   -> 201.27
   -> 201.28
   -> 201.29-> 202.11

uspto searches

Patent Apps in 128/201.23

Granted Patents in 128/201.23

Use the links above or do an advanced search in ppubs for:
(128/201.23.ccls. or 128/201.24.ccls. or 128/201.25.ccls. or 128/201.26.ccls. or 128/201.27.ccls. or 128/201.28.ccls. or 128/201.29.ccls. or 128/202.11.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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