USPC Class Details

Description: 318 electricity: motive power systems / 318 electricity: motive power systems/(560) positional servo systems (e.g., servomechanisms) (638) with particular "error-detecting" means (652) with particular position measuring instruments (656) differential transformer systems

Hierarchy/Derived subclasses

318 / 560	-> 638	-> 652	-> 656	-> 657
				-> 658
				-> 659
				-> 660
				-> 661

uspto searches

Patent Apps in 318/656

Granted Patents in 318/656

Use the links above or do an advanced search in ppubs for:
(318/656.ccls. or 318/657.ccls. or 318/658.ccls. or 318/659.ccls. or 318/660.ccls. or 318/661.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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