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) (240) telephone equipment (251) support or holder

Hierarchy/Derived subclasses

D14 / 496	-> 217	-> 11	-> 240	-> 251	-> 252
					-> 253
					-> 254

uspto searches

Patent Apps in D14/251

Granted Patents in D14/251

Use the links above or do an advanced search in ppubs for:
(D14/251.ccls. or D14/252.ccls. or D14/253.ccls. or D14/254.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.