The ornamental design for an extensioncordruler, as shown and described.
FIG. 1 is a side perspective view of the extension cord ruler, showing my new design;
FIG. 2 is a front elevation view of the extension cord ruler of FIG. 1;
FIG. 3 is a front elevation view of the extension cord ruler of FIG. 2, rotated upwardly by 90°; and,
FIG. 4 is a front elevation view of the extension cord ruler of FIG. 2, rotated downwardly by 90°.
The broken lines depict unclaimed environment with the extending collar adjacent the left side male plug having an unclaimed shape except for a flat surface aligned with the beginning of the ruled section.
The extension cord is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.