USPC Class Details

Description: 91 motors: expansible chamber type / 91 motors: expansible chamber type/(170r) relatively movable working members with one having motive fluid controlled by, movably interconnected with or moved by another (178) single valve unit controlling plural working chambers

Hierarchy/Derived subclasses

91 / 170r	-> 178	-> 179
		-> 180

uspto searches

Patent Apps in 91/178

Granted Patents in 91/178

Use the links above or do an advanced search in ppubs for:
(91/178.ccls. or 91/179.ccls. or 91/180.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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