US PATENT SUBCLASS 33 / 670
.~.~ Having marker centering means

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

501  DF  GAUGE {61}
666  DF  .~ With point marker {7}
670.~.~ Having marker centering means {4}
671  DF  .~.~.~> For marking center of a hole
672  DF  .~.~.~> Having diverging-angle bisector workpiece-contacting members with marker on angle bisector
673  DF  .~.~.~> Having adjustable workpiece-contacting centering means {2}
676  DF  .~.~.~> Having workpiece-contacting tapered centering means

DEFINITION

Classification: 33/670

Having marker centering means:

(under subclass 666) Subject matter wherein the gauge contacts an object at two points and includes means to position the marker or guide on a point equidistant from the contacted points on the object.

SEE OR SEARCH CLASS

408, Cutting by Use of Rotating Axially Moving Tool,

72+, for analogous devices used as guides for center drills.