We claim the ornamental design for a hair clipper, as shown and described.
FIG. 1 is a front perspective view of a hair clipper, showing our new design;
FIG. 2 is a rear perspective view of the hair clipper of FIG. 1.
FIG. 3 is a front side view of the hair clipper of FIG. 1.
FIG. 4 is a rear side view of the hair clipper of FIG. 1.
FIG. 5 is a right side view of the hair clipper of FIG. 1.
FIG. 6 is a left side view of the hair clipper of FIG. 1.
FIG. 7 is a top side view of the hair clipper of FIG. 1; and,
FIG. 8 is a bottom side view of the hair clipper of FIG. 1.
The evenly spaced broken lines in the drawings illustrate portions of the article which form no part of the claimed design. The dash-dot broken lines illustrate a boundary to the claim and form no part thereof.