SiRF Technology, Inc. was a pioneer in the commercial use of GPS technology for consumer applications. The company was founded in 1995 and was headquartered in San Jose, California. The company was acquired by CSR plc in 2009. On April 5, 2013, the formerly British-owned American-based company SiRF was acquired by the American company Qualcomm. SiRF manufactured a range of patented GPS chipsets and software for consumer navigation devices and systems.