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The ornamental design for a ladder top side rail extension set, as shown and described.
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FIG. 1 is a left side perspective view of left and right ladder side rail top extension embodying our new design with a ladder represented in dotted lines for illustrative purposes;
FIG. 2 is a right side perspective view of the showing in FIG. 1;
FIG. 3 is a left side view of a left ladder side rail top extension set embodying our new design;
FIG. 4 is a right side view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof; the the right ladder side rail top extension set is a mirror image of the left ladder side rail top extension set and the dotted line representations form no part of the claimed design.
Clark, Bruce D., Feik, Frederick G.
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