USPC Class Details – HistoricIP

Description: 712 electrical computers and digital processing systems: processing architectures and instruction processing (e.g., processors) / 712 electrical computers and digital processing systems: processing architectures and instruction processing (e.g., processors)/(220) processing control (221) arithmetic operation instruction processing

Hierarchy/Derived subclasses

712 / 220

-> 221

-> 222

uspto searches

Patent Apps in 712/221

Granted Patents in 712/221

Use the links above or do an advanced search in ppubs for:
(712/221.ccls. or 712/222.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.