USPC Class Details

Description: 242 winding, tensioning, or guiding / 242 winding, tensioning, or guiding/(324) unwinding and rewinding a machine convertible information carrier (e.g., magnetic tape or photographic film) (335) cartridge system (i.e., cartridge work station or cartridge) (339) cartridge ejector

Hierarchy/Derived subclasses

242 / 324

-> 335

-> 339

uspto searches

Patent Apps in 242/339

Granted Patents in 242/339

Use the links above or do an advanced search in ppubs for:
(242/339.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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