The ornamental design for an ultrasoundtherapeutictreatmenthandpiece, as shown and described.
FIG. 1 is a top right perspective view of an ultrasound therapeutic treatment handpiece showing the new design.
FIG. 2 is a bottom left perspective view thereof.
FIG. 3 is a top view thereof.
FIG. 4 is a bottom view.
FIG. 5 is a left view.
FIG. 6 is a right view.
FIG. 7 is an enlarged front view.
FIG. 8 is an enlarged rear view.
FIG. 9 is an enlarged view of box 9 in FIG. 2; and,
FIG. 10 is an enlarged view of box 10 in FIG. 4.
The shorter and lighter dash lines in the drawings depict portions of the ultrasound therapeutic treatment handpiece that form no part of the claimed design. The broken away symbols in the middle of the cord in FIGS. 1-6, 9, and 10 and any portion of the article beyond what is shown forms no part of the claimed design. The dot dash lines in the drawings depict the boundaries of the enlarged views that form no part of the claimed design.