Description: 325 / (71) Receivers (87) Frequency or Phase Modulation (89) With Squelch or Other Output Limiting Means

Hierarchy/Derived subclasses

325 / 71-> 87-> 89

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search just 325/89

This will show what classes derive from the input. Ex: entering 78/35 shows the derived classes and the search that can be used to find patents in those subclasses.
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