The ornamental design for a supportdevice, as shown and described.
FIG. 1 is a top perspective view of the support device, showing our new design;
FIG. 2 is a bottom perspective view of the support device of FIG. 1;
FIG. 3 is a front view of the support device of FIG. 1;
FIG. 4 is a rear view of the support device of FIG. 1;
FIG. 5 is a left side view of the support device of FIG. 1;
FIG. 6 is a right side view of the support device of FIG. 1;
FIG. 7 is a top view of the support device of FIG. 1;
FIG. 8 is a bottom view of the support device of FIG. 1; and,
FIG. 9 is a perspective view of the support device of FIG. 1 in an environment of use.
The short dash-short dash broken lines depict portions of the article that form no part of the claimed design. The dash-dot broken lines show unclaimed boundaries of the claimed design. The long dash-short dash broken lines in FIGS. 1, 2, and 8 illustrate a representative lattice structure that fills the cavity but does not represent any particular lattice structure.