USPC Class Details – HistoricIP

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) (261) phonograph

Hierarchy/Derived subclasses

D14 / 496	-> 217	-> 11	-> 261	-> 262
				-> 263
				-> 264

uspto searches

Patent Apps in D14/261

Granted Patents in D14/261

Use the links above or do an advanced search in ppubs for:
(D14/261.ccls. or D14/262.ccls. or D14/263.ccls. or D14/264.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.