Portable cofferdam

Abstract

Claims

The ornamental design for a portable cofferdam, as shown and described.

Description

(1) FIG. 1 is a left perspective view of a portable cofferdam showing our new design;

(2) FIG. 2 is a right view of the portable cofferdam of FIG. 1; and,

(3) FIG. 3 is a top view of the portable cofferdam of FIG. 1.

(4) The broken line portions of the drawings are included to show unclaimed subject matter and form no part of the claimed design.