USPC Class Details

Description: 338 electrical resistors / 338 electrical resistors/(68) mechanically variable (e.g., rheostat) (89) mathematical function (e.g., sine-cosine potentiometer)

Hierarchy/Derived subclasses

338 / 68	-> 89	-> 90
		-> 91

uspto searches

Patent Apps in 338/89

Granted Patents in 338/89

Use the links above or do an advanced search in ppubs for:
(338/89.ccls. or 338/90.ccls. or 338/91.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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