The asserted patent is U.S. Patent No. 7,558,730, titled "Speech recognition and transcription among users having heterogeneous protocols." It was initially filed in 2001 but abandoned, refiled in 2007, and granted in 2009. Siri was first introduced alongside the iPhone 4s in October 2011.
The complaint is very exhaustive and technical, but in simple terms, AVRS believes Siri's ability to process voice commands across multiple protocols and operating systems, such as iOS and macOS, infringes on its patented technology.
AVRS claims that Apple has been aware of the patent since at least 2013, and that Apple has cited it at least 77 times in its other speech recognition patents and in other litigation. AVRS says it also sent Apple correspondence in 2015, but to no avail, as Apple allegedly continues its willful infringement to present day.
AVRS has demanded a jury trial in Arizona district court, where it is seeking damages from Apple, in an amount no less than a reasonable royalty.
AVRS says its speech recognition software was first introduced in 1994, but it does not appear to offer any products or services that incorporate its patented technologies on its website, so it is more than likely a non-practicing entity.
"Our portfolio of intellectual property is the foundation of our business model," the company's website acknowledges.
Apple has yet to formally respond to the complaint.