The ornamental design for a ladderkeeperbracket, as shown and described.
FIG. 1 is a left side, top, and front perspective view of a ladder keeper
bracket showing my new design, with a ladder being shown in broken lines
for environmental association purposes only;
FIG. 2 is a front elevation view thereof, the rear view being a mirror
image;
FIGS. 3 and 4 are respectively top and bottom plan views thereof; and
FIGS. 5 and 6 are respectively left and right side elevational views
thereof.