Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 345/581Granted Patents in 345/581
Use the links above or do an advanced search in ppubs for:
(345/581.ccls. or 345/582.ccls. or 345/583.ccls. or 345/584.ccls. or 345/585.ccls. or 345/586.ccls. or 345/587.ccls. or 345/588.ccls. or 345/589.ccls. or 345/590.ccls. or 345/591.ccls. or 345/592.ccls. or 345/593.ccls. or 345/594.ccls. or 345/595.ccls. or 345/596.ccls. or 345/597.ccls. or 345/598.ccls. or 345/599.ccls. or 345/600.ccls. or 345/601.ccls. or 345/602.ccls. or 345/603.ccls. or 345/604.ccls. or 345/605.ccls. or 345/606.ccls. or 345/607.ccls. or 345/608.ccls. or 345/609.ccls. or 345/610.ccls. or 345/611.ccls. or 345/612.ccls. or 345/613.ccls. or 345/614.ccls. or 345/615.ccls. or 345/616.ccls. or 345/617.ccls. or 345/618.ccls.)
At about 35 search terms the uspto will give you this error "Too many search terms" The 35th term is bold.
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.