 The General Motors Hummer and Chrysler Jeep have been waging battle in U.S. courts over the right to use seven slots in their respective radiator grilles.Chrysler Jeep claims it has the exclusive rights to use the seven vertical slits since it is the sole remaining assignee of the various companies since Willys gave their postwar jeeps seven slots instead of Ford's nine-slot design for the Jeep.Jeep advertising has always emphasized the brand's vehicles' off-road capabilities.