US PATENT SUBCLASS 407 / 59
.~.~.~ Plural teeth spaced about a helix

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

30  DF  ROTARY CUTTING TOOL {6}
56  DF  .~ Having peripherally spaced teeth {4}
58  DF  .~.~ Circumferentially staggered {1}
59.~.~.~ Plural teeth spaced about a helix

DEFINITION

Classification: 407/59

Plural teeth spaced about a helix:

(under subclass 58) Device including at least three protuberances having sharp cutting edges, which protuberances are spaced about the tool in the form of a screw thread extending there-along.