USPC Class Details

Description: 438 semiconductor device manufacturing: process / 438 semiconductor device manufacturing: process/(22) making device or circuit emissive of nonelectrical signal (29) including integrally formed optical element (e.g., reflective layer, luminescent material, contoured surface, etc.) (30) liquid crystal component

Hierarchy/Derived subclasses

438 / 22

-> 29

-> 30

uspto searches

Patent Apps in 438/30

Granted Patents in 438/30

Use the links above or do an advanced search in ppubs for:
(438/30.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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