US Patent 7152752 Modular and transportable bookshelves

In one embodiment of the present invention modules for both the display and transport of books are described. Each module of the one embodiment comprises an interlocking feature for coupling two modules together with an open side of the modules facing horizontally outwardly. The interlocking feature further permits a user to partially rest a upper module on the front portion of the topside of an underlying module to align and steady the potentially heavy upper module before coupling the modules. The one embodiment modules are also configured for being stacked together with the open side of the modules facing upwardly for transport.