USPC Class Details

Description: 137 fluid handling / 137 fluid handling/(87.01) self-proportioning or correlating systems (109) self-controlled branched flow systems (115.01) bypass or relief controlled by main line fluid condition (115.13) pressure responsive (115.18) bypass or relief valve responsive to pressure downstream of outlet valve (115.19) pilot valve

Hierarchy/Derived subclasses

137 / 87.01

-> 109

-> 115.01

-> 115.13

-> 115.18

-> 115.19

uspto searches

Patent Apps in 137/115.19

Granted Patents in 137/115.19

Use the links above or do an advanced search in ppubs for:
(137/115.19.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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