USPC Class Details

Description: 303 fluid-pressure and analogous brake systems / 303 fluid-pressure and analogous brake systems/(121) speed-controlled (127) pneumatic (128) for a railway vehicle (e.g., train)

Hierarchy/Derived subclasses

303 / 121-> 127-> 128-> 129-> 130
   -> 131
   -> 132
   -> 133
   -> 134
   -> 135
   -> 136

uspto searches

Patent Apps in 303/128

Granted Patents in 303/128

Use the links above or do an advanced search in ppubs for:
(303/128.ccls. or 303/129.ccls. or 303/130.ccls. or 303/131.ccls. or 303/132.ccls. or 303/133.ccls. or 303/134.ccls. or 303/135.ccls. or 303/136.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