The ornamental design for a sterilizationdevice, as shown and described.
FIG. 1 is a first perspective view of the sterilization device;
FIG. 2 is a second perspective view of the sterilization device;
FIG. 3 is a front elevational view of the sterilization device;
FIG. 4 is a back elevational view of the sterilization device;
FIG. 5 is a left side elevational view of the sterilization device;
FIG. 6 is a right side elevational view of the sterilization device;
FIG. 7 is a top elevation view of the sterilization device; and,
FIG. 8 is a bottom elevation view of the sterilization device.
The broken lines immediately adjacent the shaded areas represent the bounds of the claim, while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.