Apple Insider:

Lodged in Northern Illinois District Court on Thursday, Samuel Lit’s lawsuit asserts Apple’s website homepage, which contains a number of display windows that cycle through various new and upcoming products, is in infringement of a patent covering web carousel technology.

As of this writing, Apple.com features a large dynamic carousel element with a four-pane UI cycling through major product advertisements for iPhone 6s, iPad Pro, Apple Watch and MacBook. Assets are rotated on a timer, hence the term “carousel,” though visitors are able to cycle through at their leisure by clicking on interactive onscreen arrows or a row of dots.

Apple is not alone in its use of web carousels. Take a look at the Major League Baseball home page, for example. As of this post, both sites still have their carousels up and running.