Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 119/452Granted Patents in 119/452
Use the links above or do an advanced search in ppubs for:
(119/452.ccls. or 119/453.ccls. or 119/454.ccls. or 119/455.ccls. or 119/456.ccls. or 119/457.ccls. or 119/458.ccls. or 119/459.ccls. or 119/460.ccls. or 119/461.ccls. or 119/462.ccls. or 119/463.ccls. or 119/464.ccls. or 119/465.ccls. or 119/466.ccls. or 119/467.ccls. or 119/468.ccls. or 119/469.ccls. or 119/470.ccls. or 119/471.ccls. or 119/472.ccls. or 119/473.ccls. or 119/474.ccls. or 119/475.ccls. or 119/476.ccls. or 119/477.ccls. or 119/478.ccls. or 119/479.ccls. or 119/480.ccls. or 119/481.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.