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

Hierarchy/Derived subclasses

74 / 840	-> 89	-> 89.23	-> 89.24
			-> 89.25
			-> 89.26
			-> 89.27
			-> 89.28
			-> 89.29	-> 89.3
				-> 89.31
			-> 89.32
			-> 89.33
			-> 89.34
			-> 89.35
			-> 89.36
			-> 89.37
			-> 89.38
			-> 89.39
			-> 89.4	-> 89.41
			-> 89.42
			-> 89.43
			-> 89.44
			-> 89.45

uspto searches

Patent Apps in 74/89.23

Granted Patents in 74/89.23

Use the links above or do an advanced search in ppubs for:
(74/89.23.ccls. or 74/89.24.ccls. or 74/89.25.ccls. or 74/89.26.ccls. or 74/89.27.ccls. or 74/89.28.ccls. or 74/89.29.ccls. or 74/89.3.ccls. or 74/89.31.ccls. or 74/89.32.ccls. or 74/89.33.ccls. or 74/89.34.ccls. or 74/89.35.ccls. or 74/89.36.ccls. or 74/89.37.ccls. or 74/89.38.ccls. or 74/89.39.ccls. or 74/89.4.ccls. or 74/89.41.ccls. or 74/89.42.ccls. or 74/89.43.ccls. or 74/89.44.ccls. or 74/89.45.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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