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The ornamental design for a sheetrock utility knife, as shown and described
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FIG. 1 is a bottom, rear and left side perspective view of a sheetrock utility knife showing my new design with a razor blade in an extended blade position and a saw in an extended saw position;
FIG. 2 is a bottom, rear and right side perspective view thereof, with the razor blade in a retracted blade position and the saw in a folded saw position;
FIG. 3 is a left side elevational view thereof, showing the razor blade in a retracted blade position and the saw in a folded saw position;
FIG. 4 is a left side elevational view thereof, showing the razor blade in the extended blade position and the saw in a fully extended saw position;
FIG. 5 is a right side elevational view thereof, showing the razor blade in the extended blade position and the saw in the retracted saw position;
FIG. 6 is a front elevational view of my design as shown in FIG. 3;
FIG. 7 is a rear elevational view of my design as shown in FIG. 3;
FIG. 8 is a top plan view thereof; and,
FIG. 9 is a bottom plan view thereof.
Black, Joseph D., McNamara, Harold C.
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