The ornamental design for a case for electroniccommunicationdevice, as shown and described.
FIG. 1 is a top, front, right side perspective view of an embodiment of a case for an electronic communication device;
FIG. 2 is a top, rear, right side perspective view thereof;
FIG. 3 is a front plan view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a left side elevation view thereof;
FIG. 7 is a right side elevation view thereof; and,
FIG. 8 is a rear plan view thereof.
The dash-dash broken lines illustrate portions of a case for an electronic communication device that form no part of the claimed design. The dash-dot-dash broken lines represent boundaries of the claimed design and form no part of the claimed design. The regions between the dash-dot-dash broken lines form no part of the claimed design.