The Cupertino based firm previously failed in its attempt to be granted a patent to its store design. The United States Patent & Trademark Office had described the application as not being "inherently distinctive". Now, though, it's submitted a 122-page document explaining why the layout of its retail stores is unique.

Nonetheless, the United States Patent & Trademark Office did grant the company a patent on its signature glass staircase.

The company, which recently patented a 'smart shoe', tops the list of the most profitable stores in the United States. Apple's chain of retail stores boast the among the highest sales per square foot of retail space, which averages $5,600.