The ornamental design for an umbrella, as shown and described.
FIG. 1 is a top, perspective view of an umbrella;
FIG. 2 is a rear elevational view of the umbrella shown in FIG. 1;
FIG. 3 is a front elevational view of the umbrella shown in FIG. 1;
FIG. 4 is a right side elevational view of the umbrella shown in FIG. 1, the left side being a mirror image thereof;
FIG. 5 is a top plan view of the umbrella shown in FIG. 1; and,
FIG. 6 is a bottom plan view of the umbrella shown in FIG. 1.
The broken lines on the drawings are shown for the purpose of illustrating unclaimed portions of the Umbrella and form no part of the claimed design.
The Umbrella is shown with a symbolic break in the pole, highlighted by brackets. The appearance of any portion of the article between the break lines forms no part of the claimed design.
The umbrella is shown with symbolic breaks in the canopy, highlighted by brackets. The symbolic breaks indicate that the appearance of any portion of the article between the break lines forms no part of the claimed design.