The ornamental design for a piezoelectricelement, as shown and described.
FIG. 1 is a front view of a piezoelectric element showing our new design;
FIG. 2 is a rear view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a perspective view thereof;
FIG. 8 is an enlarged cross sectional view taken along lines 8-8 and 801-801 in FIG. 1;
FIG. 9 is an enlarged cross sectional view taken along lines 9-9 and 901-901 in FIG. 1; and,
FIG. 10 is an enlarged portion view taken from the encircled portion labeled “FIG. 10” in FIG. 7.
The even broken lines depict unclaimed portions of the piezoelectric element and form no part of the claimed design. The dot-dash lines in the drawings depict the boundary lines of the claimed subject matter and do not form part of the claimed design.