The ornamental design for a therapeuticdevice, as shown and described.
FIG. 1 is a front perspective view of a therapeutic device depicting a new design;
FIG. 2 is a back perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a back elevational view thereof;
FIG. 5 is a right elevational view thereof;
FIG. 6 is a left elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is another front perspective view thereof.
The broken line disclosures in FIG. 9 represent environment which forms no part of the claimed design. The remaining broken line disclosures in the views represent portions of the therapeutic device that form no part of the claimed design.