USPC Class Details

Description: 346 recorders / 346 recorders/(33r) combined with external recorder operating means

Hierarchy/Derived subclasses

346 / 33r-> 34
 -> 35
 -> 36
 -> 37
 -> 38
 -> 40
 -> 41
 -> 42
 -> 43
 -> 33wl
 -> 33p
 -> 33f
 -> 33m
 -> 33ec
 -> 33s
 -> 33mc
 -> 33a
 -> 33b
 -> 33c
 -> 33me
 -> 33d
 -> 33tp

uspto searches

Patent Apps in 346/33R

Granted Patents in 346/33R

Use the links above or do an advanced search in ppubs for:
()

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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