USPC Class Details

Description: 216 etching a substrate: processes / 216 etching a substrate: processes/(13) forming or treating electrical conductor article (e.g., circuit, etc.) (21) repairing circuit

Hierarchy/Derived subclasses

216 / 13

-> 21

uspto searches

Patent Apps in 216/21

Granted Patents in 216/21

Use the links above or do an advanced search in ppubs for:
(216/21.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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