Chinese telecommunications-equipment maker Huawei Technologies Co. said Wednesday it has filed a lawsuit in the U.S. against Samsung Electronics Co., alleging that the South Korean electronics maker infringed a number of patents covering mobile devices and cellular-communications technology. As WSJ's Juro Osawa and Jonathan Cheng report:

The lawsuit marks the first major legal challenge by a Chinese smartphone maker against Samsung, which has dominated world-wide sales over the past several years. Chinese companies have growing ambitions in the smartphone world, where major players like Huawei are investing billions...