A US jury hit Microsoft with a hefty $242 million (around ¥1.75 billion) fine for patent infringement. The verdict, reached in Delaware on May 10, stems from a lawsuit filed by IPA Technologies in 2018.
Microsoft is planning to appeal the jury’s decision
The lawsuit claimed Microsoft’s Cortana voice assistant infringed on IPA’s patent for voice recognition technology used in computer communication software. Originally, the case involved multiple IPA patents, but ultimately focused on just one. Microsoft argued they didn’t infringe and the patent itself was invalid.

IPA Technologies, a subsidiary of Wi-LAN, acquired the patent in question from SRI International’s Siri Company. Apple then acquired Siri Company and its technology in 2010, using it for their Siri voice assistant.
Microsoft plans to appeal the decision. “We firmly believe we did not infringe,” a spokesperson said. IPA and Wi-LAN haven’t commented publicly yet.
This isn’t IPA’s first rodeo. They’ve sued Google and Amazon over similar patents. Amazon successfully defended itself in 2021, while the Google case remains ongoing.
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