FIG. 1 is a right-side view of a protective helmet showing our new design;
FIG. 2 is a left-side view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a top, front and right-side view thereof;
FIG. 8 is a bottom, rear and right-side view thereof; and,
FIG. 9 is another right-side view thereof, the only difference residing in the removal of the broken line detail on the face shield in FIG. 1.
The details shown in broken lines in FIGS. 1-9 form no part of the claimed design.