USPC Class Details

Description: 138 pipes and tubular conduits / 138 pipes and tubular conduits/(118) flexible (121) corrugated

Hierarchy/Derived subclasses

138 / 118-> 121-> 122

uspto searches

Patent Apps in 138/121

Granted Patents in 138/121

Use the links above or do an advanced search in ppubs for:
(138/121.ccls. or 138/122.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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