USPC Class Details

Description: 331 oscillators / 331 oscillators/(1r) automatic frequency stabilization using a phase or frequency sensing means (18) with reference oscillator or source (23) sensing modulation (e.g., frequency modulation controlled oscillator

Hierarchy/Derived subclasses

331 / 1r

-> 18

-> 23

-> 24

uspto searches

Patent Apps in 331/23

Granted Patents in 331/23

Use the links above or do an advanced search in ppubs for:
(331/23.ccls. or 331/24.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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