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The ornamental design for a retractable blade utility knife, as shown and described. |
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FIG. 1 is a front elevational view of a retractable blade utility knife showing my new design therefor;
FIG. 2 is a front elevational view thereof, shown with the hooked blade in an extended position;
FIG. 3 is a front elevational view thereof, shown with the straight blade in an extended position;
FIG. 4 is a perspective view of FIG. 3;
FIG. 5 is a top plan view of FIG. 3;
FIG. 6 is another front elevational view thereof; wherein the rear view is a mirror image thereof;
FIG. 7 is a bottom plan view of FIG. 6;
FIG. 8 is a left side elevational view of FIG. 6; and,
FIG. 9 is a right side elevational view of FIG. 6.
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