US D499700 S1
FIG. 1 is an isometric view of our design for a circuit breaker;
FIG. 2 is a front view thereof; and
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a top view thereof.
The parts shown in broken lines form no part of the claimed design.