Taiwan-based IC design house Richtek has announced that it has filed a patent infringement complaint with the US International Trade Commission (ITC) against uPI Semiconductor,

AMD, Sapphire Technology, Diamond Multimedia and XFX Technology. The company also filed a lawsuit in northern California.

The patents involved in the dispute are US patents No. 7315190, 6414470 and 7132717.

By: DocMemory
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