USPC Class Details – HistoricIP

Description: 277 seal for a joint or juncture / 277 seal for a joint or juncture/(345) seal between relatively movable parts (i.e., dynamic seal) (500) circumferential contact seal for other than piston (549) peripheral radially sealing flexible projection (e.g., lip seal, etc.) (553) bias feature other than nominal garter spring (557) axially extending helical or spiral spring

Hierarchy/Derived subclasses

277 / 345

-> 500

-> 549

-> 553

-> 557

uspto searches

Patent Apps in 277/557

Granted Patents in 277/557

Use the links above or do an advanced search in ppubs for:
(277/557.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.