General Motors Co., Fiat Chrysler Automobiles and Maserati North America have joined a long list of auto manufacturers that have been sued by a Texas company that makes and sells integration devices that connect mobile devices to car stereo systems.

Blitzsafe Texas, based in Marshall, has owned two patents since 2009 and 2012 for its device that allows people to link their smartphones and car audio systems, enabling them to take hands-free phone calls and play music. One patent covers a wired integration device, and the other covers a Bluetooth device.