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 (140.7) switchboard or multiple line access

Hierarchy/Derived subclasses

D14 / 496	-> 140	-> 140.1	-> 140.7	-> 140.8
				-> 140.9	-> 140.11

uspto searches

Patent Apps in D14/140.7

Granted Patents in D14/140.7

Use the links above or do an advanced search in ppubs for:
(D14/140.7.ccls. or D14/140.8.ccls. or D14/140.9.ccls. or D14/140.11.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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