Way back in January 2020, Sonos sued Google over patent infringement. Today, the streaming speaker company scored an early victory with the U.S. International Trade Commission. A preliminary ruling penned by ITC chief administrative law judge Charles Bullock finds that Google infringed on five patents.

“Today the ALJ has found all five of Sonos’ asserted patents to be valid and that Google infringes on all five patents,” Sonos Chief Legal Officer Eddie Lazarus said in a statement to TechCrunch. “We are pleased the ITC has confirmed Google’s blatant infringement of Sonos’ patented inventions. This decision re-affirms the strength and breadth of our portfolio, marking a promising milestone in our long-term pursuit to defend our innovation against misappropriation by Big Tech monopolies.”

The finding is still very much early days for what’s likely to be an even more protracted battled battle between the two companies. Sonos’ complaint stems from Google’s own family of streaming speakers. Google entered the category, long dominated by Sonos, roughly four and a half years ago with the original Home speaker. The line now includes a number of products now listed under the Nest banner.

“Google has been blatantly and knowingly copying our patented technology,” Sonos CEO Patrick Spence said in a statement when the suit was initially filed. “Despite our repeated and extensive efforts over the last few years, Google has not shown any willingness to work with us on a mutually beneficial solution. We’re left with no choice but to litigate.”

Sonos noted similar issues with Amazon devices (Google’s chief competitor in the category) at the time, but the company opted to focus its time, money and resources on a battle with Google, instead.

Ultimately, Sonos is hoping to use the ITC to block the import of those smart speakers, along with other Google hardware, including the Chromecast and Pixels. Such a decision would be a massive hit to Google’s hardware ambitions. A final ruling isn’t expected until December 13, however, after which point a potential import ban would take 60 days to go into effect.

We’ve reached out to Google for comment on the preliminary ruling.