FIG. 1 is a perspective view taken from the top, front, left side of the double aisle sign base supporting two sign holders of a first type mounted in the double aisle sign base;
FIG. 2 is a perspective view taken from the top, front, left side of the double aisle sign base supporting two sign holders of a second type mounted in the double aisle sign base;
FIG. 3 is a perspective view taken from the top, front, left side of the double aisle sign base showing my new design according to a first embodiment;
FIG. 4 is a perspective view taken from the bottom, back, right side thereof;
FIG. 5 is an elevational view of the left side thereof;
FIG. 6 is an elevational view of the right side thereof;
FIG. 7 is an elevational view of the front thereof;
FIG. 8 is an elevational view of the back thereof;
FIG. 9 is a top plan view thereof;
FIG. 10 is a bottom plan thereof;
FIG. 11 is a perspective view taken from the top, front, left side of the double aisle sign base showing my new design according to a second embodiment;
FIG. 12 is a perspective view taken from the bottom, back, right side of the double aisle sign base according to the second embodiment;
FIG. 13 is an elevational view of the left side according to the second embodiment;
FIG. 14 is an elevational view of the right side according to the second embodiment;
FIG. 15 is an elevational view of the front of the second embodiment;
FIG. 16 is an elevational view of the back of the second embodiment;
FIG. 17 is a top plan view of the second embodiment; and,
FIG. 18 is a bottom plan view of the second embodiment.
The broken lines show features of the double aisle sign base that form no part of the claimed design.