Sirius and XM, who together compromise pretty much the entire satellite radio market, have found themselves under a lot of fire lately. Now, they are under even more, as Keystone Autonics has filed a lawsuit against both companies, citing patent infringement:

The patent at issue was awarded to George Hindman of Keystone Autonics in January. It applies to specific input and display processing of wireless data for satellite radios. The patent is a modification of an earlier patent, also held by Hindman, that applied to radios and CD players.

Only in January? They may have a tough battle ahead of them, considering that Sirius and XM have been doing business for years. The company is seeking an injunction against them to prevent further sales, though none of the involved companies are making statements at this time. On top of the injunction, Keystone is also asking for money. Surprise?