USPC Class Details

Description: 137 fluid handling / 137 fluid handling/(38) control by change of position or inertia of system (40) position relative body of water (e.g., marine governors)

Hierarchy/Derived subclasses

137 / 38-> 40-> 41
  -> 42

uspto searches

Patent Apps in 137/40

Granted Patents in 137/40

Use the links above or do an advanced search in ppubs for:
(137/40.ccls. or 137/41.ccls. or 137/42.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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