USPC Class Details

Description: 438 semiconductor device manufacturing: process / 438 semiconductor device manufacturing: process/(48) making device or circuit responsive to nonelectrical signal (57) responsive to electromagnetic radiation (69) including integrally formed optical element (e.g., reflective layer, luminescent layer, etc.) (70) color filter

Hierarchy/Derived subclasses

438 / 48

-> 57

-> 69

-> 70

uspto searches

Patent Apps in 438/70

Granted Patents in 438/70

Use the links above or do an advanced search in ppubs for:
(438/70.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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