I claim the ornamental design for an extendible table, as shown and described.
FIG. 1 is a perspective view of an extendible table prior to extension showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a perspective view of the extendible table in a semi-extended position;
FIG. 5 is a perspective view of the extendible table in a fully extended position; and,
FIG. 6 is a perspective detail view of the extendible table in an intermediate position between the semi-extended position and the fully extended position.
The stretchers between the leg members and the hinges between the table leaves are shown in broken lines because such stretchers are shown for environmental purposes only without being part of the claimed design.