USPC Class Details

Description: 91 motors: expansible chamber type / 91 motors: expansible chamber type/(218) cyclically operable (281) working member controlled motive fluid for distributor motor (290) working member traverses pilot port in working chamber side wall (291) port controls separate motor for intermediate pilot valve

Hierarchy/Derived subclasses

91 / 218

-> 281

-> 290

-> 291

-> 292

uspto searches

Patent Apps in 91/291

Granted Patents in 91/291

Use the links above or do an advanced search in ppubs for:
(91/291.ccls. or 91/292.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.

Display:

Back