I claim the ornamental design for a combination safety utility knife blade, as shown and described.
FIG. 1 is a front elevational view of a first embodiment of a combination safety utility knife blade, showing my new design, the rear elevational view being a mirror image thereof;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a bottom plan view of a second embodiment of a combination safety utility knife blade, the front elevational view being identical to FIG. 1 and the rear elevational view being a mirror image thereof.
FIG. 4 is a front elevational view thereof, the rear elevational view being a mirror image thereof; and,