USPC Class Details

Description: 271 sheet feeding or delivering / 271 sheet feeding or delivering/(8.1) feeding (145) pack holders (147) advancer (152) control of advancer responsive to sensing of foremost sheet

Hierarchy/Derived subclasses

271 / 8.1-> 145-> 147-> 152-> 153
    -> 154-> 155
    -> 156

uspto searches

Patent Apps in 271/152

Granted Patents in 271/152

Use the links above or do an advanced search in ppubs for:
(271/152.ccls. or 271/153.ccls. or 271/154.ccls. or 271/155.ccls. or 271/156.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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