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 (217) element or attachment (11) (221) speaker (12)

Hierarchy/Derived subclasses

D14 / 496	-> 217	-> 11	-> 221	-> 12	-> 222
					-> 223
					-> 224	-> 224.1

uspto searches

Patent Apps in D14/221

Granted Patents in D14/221

Use the links above or do an advanced search in ppubs for:
(D14/221.ccls. or D14/12.ccls. or D14/222.ccls. or D14/223.ccls. or D14/224.ccls. or D14/224.1.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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