An employee of Samsung Electronics demonstrates Samsung's Galaxy Tab tablet during a photo opportunity at a showroom of the company in Seoul January 18, 2011. Reuters/Lee Jae-WonApple sued rival Samsung Electronics claiming that Samsung’s Galaxy line of mobile phones and tablet “slavishly” copies the iPhone and iPad, according to court papers. The lawsuit, filed on Friday, alleges Samsung copied the look, product design and product user interface of Apple’s products. Samsung violated Apple’s patents and trademarks, the suit alleges.