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Californian company Noise Free Wireless leveled a patent infringement suit against Apple, alleging that the tech giant stole their noise-canceling technology. The suit claims that Noise Free met with Apple in 2007 to discuss using Noise Free digital voice enhancement technology in Apple’s iPhone and iPad. Noise Free claims they showed Apple PowerPoint presentations and provided them with circuit boards and a sample phone.

Noise Free alleges that Apple then cut off communications with Noise Free briefly in 2009 before filing for their own “use-specific noise suppression for voice quality improvements” patent. In 2010, Apple then cut off business relations with Noise Free and decided to work instead with a competitor, Mountain View, Calif.-based Audience.

Noise Free filed their complaint with the US District Court for the Northern District of California, claiming that Apple violated their noise-canceling technology patent, breached a contract, and stole trade secrets.

None of the involved companies seem to want to talk about it, though.

Apple has reportedly been unresponsive to queries, though it would be unusual for them if they acted otherwise.

Noise Free hasn’t responded to TechRadar’s email and phone queries, and Audience replied to say that they’re not commenting “at this time.”

Hopefully, all three companies are preparing statements, as there’s plenty about this situation that needs clarification.