USPC Class Details – HistoricIP

Description: 380 cryptography / 380 cryptography/(277) key management (278) key distribution (283) user-to-user key distributed over data link (i.e., no center)

Hierarchy/Derived subclasses

380 / 277	-> 278	-> 283	-> 284
			-> 285

uspto searches

Patent Apps in 380/283

Granted Patents in 380/283

Use the links above or do an advanced search in ppubs for:
(380/283.ccls. or 380/284.ccls. or 380/285.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.