A display having a modular element structure, including a tubular upright provided with a base and having at least one recess, pointed in at two longitudinally separate portions embracing the upright, each of the portions being provided with a projection complimentary to the recess, a threaded...http://www.google.com/patents/US5671579?utm_source=gb-gplus-sharePatent US5671579 - Display having modular element structure
