LG claims the Blu-ray technology used in the Sony consoles infringes LG patents. Sony denies that claim.
LG convinced the Breda court that it had enough evidence for a summary judgment under Dutch law and asked for the seizure to take place immediately. If Sony had been warned ahead of time, the Japanese company might have quickly moved the consoles to a different European jurisdiction.
Customs authorities carried out the Breda order, which was published this week by the court, but Sony was only informed of the decision after the fact.
The seizures reportedly included 300,000 PlayStation 3s with an estimated market value of around $60 million -- potentially a serious disruption of Sony's European distribution chain.
LG lawyers argued that Sony owes LG at least $150 million for patent violations, calculating around $2.50 in licensing fees for each Blu-ray containing device Sony has sold.