USPC Class Details

Description: 52 static structures (e.g., buildings) / 52 static structures (e.g., buildings)/(19) with entrance for persons or objects in horizontal or inclined cover (21) masonry or concrete

Hierarchy/Derived subclasses

52 / 19

-> 21

uspto searches

Patent Apps in 52/21

Granted Patents in 52/21

Use the links above or do an advanced search in ppubs for:
(52/21.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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