USPC Class Details

Description: 172 earth working / 172 earth working/(204) alternating for right or left hand operation (other than scraper) (219) tool shifted for opposite throw (221) plural tools shifted about individual vertical axes

Hierarchy/Derived subclasses

172 / 204

-> 219

-> 221

-> 222

uspto searches

Patent Apps in 172/221

Granted Patents in 172/221

Use the links above or do an advanced search in ppubs for:
(172/221.ccls. or 172/222.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.

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