FIG. 1 is an isometric view of a drainage channel according to our invention, from above,
FIG. 2 is an isometric view thereof from below and from the opposite end,
FIG. 3 is a side elevational view thereof,
FIG. 4 is a side elevational view from the side opposite to FIG. 3,
FIG. 5 is a top plan view thereof,
FIG. 6 is a bottom plan view thereof,
FIG. 7 is an end view thereof; and,
FIG. 8 is an end view from the opposite end.
The claimed design is shown broken away to indicate that no particular length of drainage channel forms a part of the claimed design.