Patent ID: 7152752

Claim:
A module suitable for displaying books or other articles comprising: spaced apart left and right sides; an open front side bounded on two opposite front side edges by the left and right sides; a back side spaced from the open front side and intersecting with the left and right sides along respective left and right edges; and top and bottom sides, each intersecting with the left, right, and back sides along the respective left, right and back edges thereof one of the top and bottom sides including a tenon and another of the top and bottom sides including a mortise, wherein: the tenon includes a tenon pair of opposing outwardly facing sidewalls comprising a dovetail section tenon pair of opposing outwardly facing sidewalls, the dovetail section tenon pair of opposing outwardly facing sidewalls being substantially acutely angled relative to one outside surface of the tenon, the one outside surface of the tenon being substantially parallel to the top and bottom sides, and located on an outwardly facing surface of the tenon: and the mortise includes a mortise pair of opposing outwardly facing sidewalls comprising a dovetail section mortise pair of opposing outwardly facing sidewalls, the dovetail section being acutely angled relative to one outside surface of the mortise, the one outside surface of the mortise being substantially parallel to the top and bottom sides, and located on an outwardly facing surface of the mortise; and the tenon pair or mortise pair of opposing outwardly facing sidewalls further comprise a non-dovetail section tenon pair or mortise pair of opposing outwardly facing sidewalls, respectively, the non-dovetail section of the tenon pair or mortise pair of opposing outwardly facing sidewalls having substantially planar surfaces on substantially different planes than the dovetail section of the tenon pair or mortise pair of opposing outwardly facing sidewalls, respectively; and the non-dovetail section of the tenon pair or mortise pair of opposing outwardly facing sidewalls is proximate one end of the respective tenon or mortise.