USPC Class Details

Description: 257 active solid-state devices (e.g., transistors, solid-state diodes) / 257 active solid-state devices (e.g., transistors, solid-state diodes)/(49) non-single crystal, or recrystallized, semiconductor material forms part of active junction (including field-induced active junction) (66) field effect device in non-single crystal, or recrystallized, semiconductor material (67) in combination with device formed in single crystal semiconductor material (e.g., stacked fets) (70) recrystallized semiconductor material

Hierarchy/Derived subclasses

257 / 49-> 66-> 67-> 70

uspto searches

Patent Apps in 257/70

Granted Patents in 257/70

Use the links above or do an advanced search in ppubs for:
(257/70.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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