I claim the ornamental design for a multiple guitar stand, as shown and described.
FIG. 1 is a multiple guitar stand in perspective view for 3 or more guitars;
FIG. 2 is a perspective view of the stand depicted in FIG. 1 in an alternate transport condition;
FIG. 3 is a front view of the stand depicted in FIG. 1;
FIG. 4 is a side view of the stand depicted in FIG. 1;
FIG. 5 is a plan view of the stand depicted in FIG. 1; and,
FIG. 6 is a side view of the stand depicted in FIG. 1 in an alternate transport condition.
Any surfaces of the design not shown, including interior surfaces, and the subject matter of any portions currently shown in in dashed lines form no part of the claimed invention.