I claim the ornamental design for an applicator device, as shown and described.
FIG. 1 is a front perspective view of an applicator device;
FIG. 2 is a side elevation view of the applicator device shown in FIG. 1;
FIG. 3 is a front elevation view of the applicator device shown in FIG. 1;
FIG. 4 is a rear elevation view of the applicator device shown in FIG. 1; and,
FIG. 5 is a top view of the applicator device shown in FIG. 1.
The broken lines immediately adjacent the surface shading represent unclaimed boundaries while all of the other broken lines illustrate portions of the article that forms no part of the claimed design.