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 (140) telephone equipment (142) telephone or base therefor (149) freestanding (5) (150) with provision for dialing or switching (i.e., keyset touch panel, dial, etc.)

Hierarchy/Derived subclasses

D14 / 496	-> 140	-> 142	-> 149	-> 5	-> 150	-> 151	-> 152
						-> 153

uspto searches

Patent Apps in D14/150

Granted Patents in D14/150

Use the links above or do an advanced search in ppubs for:
(D14/150.ccls. or D14/151.ccls. or D14/152.ccls. or D14/153.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.