The ornamental design for a sterilizationdevice, as shown and described.
FIG. 1 is a top perspective view of a sterilization device showing the new design.
FIG. 2 is a right side elevation view of the sterilization device.
FIG. 3 is a left side elevation view of the sterilization device.
FIG. 4 is a top view of the sterilization device.
FIG. 5 is a bottom view of the sterilization device.
FIG. 6 is a front plan view of the sterilization device.
FIG. 7 is a rear plan view of the sterilization device; and,
FIG. 8 is a rear perspective view of the sterilization device.
The broken lines in the drawings depict portions of the sterilization device that form no part of the claimed design.
The sterilization device is shown with a symbolic break in length, the appearance of any portion of the article between the break lines forms no part of the claimed design.