USPC Class Details

Description: D14 recording, communication, or information retrieval equipment / d14 recording, communication, or information retrieval equipment/(300) computer, data processor equipment (432) element or attachment (439) for computer

Hierarchy/Derived subclasses

D14 / 300	-> 432	-> 439	-> 440
			-> 441	-> 442
				-> 443
				-> 444	-> 445
					-> 446
			-> 447

uspto searches

Patent Apps in D14/439

Granted Patents in D14/439

Use the links above or do an advanced search in ppubs for:
(D14/439.ccls. or D14/440.ccls. or D14/441.ccls. or D14/442.ccls. or D14/443.ccls. or D14/444.ccls. or D14/445.ccls. or D14/446.ccls. or D14/447.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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