The ornamental design for a perforationpattern for a cover plate for a computingdevice, as shown and described.
FIG. 1 is a front view of a perforation pattern for a cover plate for a computing device;
FIG. 2 is a front perspective view of the perforation pattern for a cover plate for a computing device in use on a computing device;
FIG. 3 is a front perspective view of the perforation pattern for a cover plate for a computing device in use on another computing device; and,
FIG. 4 is a front perspective view of the perforation pattern for a cover plate for a computing device in use on another computing device.
The broken lines showing of various regions and the unshaded areas therein are for the purpose of illustrating the article and form no part of the claimed design.