US PATENT SUBCLASS 451 / 71
.~.~.~.~ Drill

Current as of: June, 1999
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451 /   HD   ABRADING

64  DF  MACHINE {12}
65  DF  .~ Combined {2}
67  DF  .~.~ With nonabrading means {4}
69  DF  .~.~.~ Cutter {2}
71.~.~.~.~ Drill

DEFINITION

Classification: 451/71

Drill:

(under subclass 69) Abrading machine in which the other tool is intended to turn about an axis and move along that axis with respect to material being cut.