USPC Class Details – HistoricIP

Description: 307 electrical transmission or interconnection systems / 307 electrical transmission or interconnection systems/(401) nonlinear reactor systems (e.g., saturable) (416) amplifiers using nonlinear reactors (i.e., magnetic amplifiers)

Hierarchy/Derived subclasses

307 / 401	-> 416	-> 417
		-> 418

uspto searches

Patent Apps in 307/416

Granted Patents in 307/416

Use the links above or do an advanced search in ppubs for:
(307/416.ccls. or 307/417.ccls. or 307/418.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.