USPC Class Details

Description: D14 recording, communication, or information retrieval equipment / d14 recording, communication, or information retrieval equipment/(496) video or audio transmission, recording or playback equipment (140) telephone equipment (140.1) signal processor type (140.4) rack mounted or stacked type

Hierarchy/Derived subclasses

D14 / 496-> 140-> 140.1-> 140.4

uspto searches

Patent Apps in D14/140.4

Granted Patents in D14/140.4

Use the links above or do an advanced search in ppubs for:
(D14/140.4.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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