Barnes & Noble claims that Microsoft is attempting to stifle competition in the mobile device market and has asked the Department of Justice to investigate, reports Bloomberg.
In a letter to Gene Kimmelman, the DoJ's chief counsel for competition policy, Barnes & Noble argues that by demanding patent royalties for Android devices, "Microsoft is attempting to raise its rivals' costs in order to drive out competition and to deter innovation in mobile devices."
Microsoft sued Barnes & Noble in March, claiming that the company's NOOK and NOOK Color tablets infringe on five Microsoft-held user interface patents. This lawsuit came after the two companies failed to agree on license terms for patents that Microsoft says are infringed upon by Android. While a growing list of Android vendors, including HTC, Samsung, and Amazon, have agreed to license Microsoft's patents, Barnes & Noble refused, claiming that the license would restrict its ability to upgrade the software on its tablets.
The book retailer claims also that the fees Microsoft was demanding were equal to or greater than those it demanded for an entire operating system, Windows Phone, even though the patents covered only "trivial and non-essential design elements" of the Android user interface. It also noted that there is only one patent common to the the five patents it is being sued over and the six that Microsoft was offering to license.