USPC Class Details

Description: 322 electricity: single generator systems / 322 electricity: single generator systems/(44) generator control (89) with armature or primary circuit control (90) plural armature circuits or windings

Hierarchy/Derived subclasses

322 / 44-> 89-> 90

uspto searches

Patent Apps in 322/90

Granted Patents in 322/90

Advanced search in patft or appft for the hierarchy would be:
(ccl/322/90)

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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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