Microsoft has won a second trial against Google-owned Motorola Mobility after the firm failed to license its patents at a reasonable rate.
The court battle was the second of two trials in a Seattle federal court and has resulted in Motorola Mobility having to pay Microsoft $14.5m (£9.2m) in damages.
Although Microsoft had asked for about double the amount in damages, it hailed the verdict in as a "landmark win".
"This is a landmark win for all who want products that are affordable and work well together. The jury's verdict is the latest in a growing list of decisions by regulators and courts telling Google to stop abusing patents," the software giant said in a statement.
In the first trial, US District Judge James Robart ruled that Microsoft owed Google just $1.8m (£1.16m) over wireless and video patents used in the Xbox consoles and Windows operating system - against the $4bn (£2.6bn) that Google had been claiming.
He set a price of half-of-one-cent for video decoding technology and 3.5 cents for the contested wireless technology. Motorola Mobility had demanded a rate of 2.25 per cent of each product's retail price.
The decisions are set to have an impact on what constitutes "fair, reasonable and nondiscriminatory" (FRAND) terms when licensing patents.
Motorola said it would appeal the latest decision, which was taken in Microsoft's home city of Seattle.