The ornamental design for a foammattresscore, substantially as shown and described.
FIG. 1 is a top plan view of a foam mattress core showing my new design,
with the area between the outline around the repeated shapes and the
shapes being recessed from the rest of the top with the pattern repeating
continuously;
FIG. 2 is a side elevational view of FIG. 1; and
FIG. 3 is an end elevational view of FIG. 2.
The characteristic features of my design are the differences between the
repeated shapes in the embossed pattern shown in FIG. 1: (1) at the
courses, (2) along the shorter side, (3) along the longer sides, and (4)
inside the outer rows of repeated shapes.