USPC Class Details

Description: 91 motors: expansible chamber type / 91 motors: expansible chamber type/(218) cyclically operable (247) timing control by relative adjustment of plural movable fluid control elements

Hierarchy/Derived subclasses

91 / 218-> 247-> 248
  -> 249-> 250-> 251
  -> 252-> 253-> 254
    -> 255
    -> 256-> 257
     -> 258
     -> 259
   -> 260-> 261
   -> 262
   -> 263

uspto searches

Patent Apps in 91/247

Granted Patents in 91/247

Use the links above or do an advanced search in ppubs for:
(91/247.ccls. or 91/248.ccls. or 91/249.ccls. or 91/250.ccls. or 91/251.ccls. or 91/252.ccls. or 91/253.ccls. or 91/254.ccls. or 91/255.ccls. or 91/256.ccls. or 91/257.ccls. or 91/258.ccls. or 91/259.ccls. or 91/260.ccls. or 91/261.ccls. or 91/262.ccls. or 91/263.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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