USPC Class Details

Description: 74 machine element or mechanism / 74 machine element or mechanism/(840) rotary driven device adjustable during operation relative to its supporting structure (89) reciprocating or oscillating to or from alternating rotary (89.23) including screw and nut (89.4) contamination related (89.41) imperforate enclosure

Hierarchy/Derived subclasses

74 / 840

-> 89

-> 89.23

-> 89.4

-> 89.41

uspto searches

Patent Apps in 74/89.41

Granted Patents in 74/89.41

Use the links above or do an advanced search in ppubs for:
(74/89.41.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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