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)/(107) regenerative type switching device (e.g., scr, comfet, thyristor) (119) bidirectional rectifier with control electrode (gate) (e.g., triac) (124) combined with field effect transistor structure (125) controllable emitter shunting

Hierarchy/Derived subclasses

257 / 107

-> 119

-> gate

-> 124

-> 125

uspto searches

Patent Apps in 257/125

Granted Patents in 257/125

Use the links above or do an advanced search in ppubs for:
(257/125.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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