US PATENT SUBCLASS 407 / 54
.~.~ With cutting edge entirely across end of tool (e.g., router bit, end mill, etc.)

Current as of: June, 1999
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407 /   HD   CUTTERS, FOR SHAPING

30  DF  ROTARY CUTTING TOOL {6}
53  DF  .~ Face or end mill {1}
54.~.~ With cutting edge entirely across end of tool (e.g., router bit, end mill, etc.)

DEFINITION

Classification: 407/54

With cutting edge entirely across end of tool (e.g., router bit, end mill, etc.):

(under subclass 53) Device including either a sharp edge or a plurality of sharp edges extending diametrically across the unsupported end of the device, so that upon axial advance the entire inscribed area of the work will be cut away.