A case alleging infringement of a patent started in a district court in the Texas Tyler division.

Lonestar Inventions alleges that Advanced Micro Devices (AMD) has breached patent number 5,208,725, called High Capacitance Structure in a Semiconductor Device.

The patent was issued on May 4th 1993 to Osman E. Akcasu, who assigned the rights to Lonestar.

Lonestar claimed the Nintendo Wii with AMD chipsets and graphics cards including the ATI 215-0669049 graphics processor, and so the Radeon HD 4870 graphics card, infringe its patent. It alleges that AMD may have incorporated elements in the patent in other devices it makes.

The filing said that AMD was sent written notice that it infringed the patent, but it has "failed and refused to cease infringing the patent". X