Next, the case will move to the penalty phase, where the jury will decide how much Perry and other defendants owe.
The verdict came following two days of deliberations in Los Angeles federal court.
"There is no copyright registration for the Beat itself, which means that no claim for copyright infringement can be brought with respect to the Beat", Billboardreported.
Perry performed a version of Dark Horse at the 2015 Super Bowl, while Joyful Noise has been viewed more than 3 million times on YouTube.
Attorneys for Gray and his co-plaintiffs, Emanuel Lambert and Chike Ojukwu, claimed a riff featured through almost half of "Dark Horse" was lifted from "Joyful Noise", which Gray released under the stage name Flame.
Just Eat Shares Soar
Just Eat shares rose 21 percent to ￡7.75, while Takeaway's were up nearly 5 percent following details of terms of the deal. The combined entity will be one of the biggest food delivery providers not just in Europe but also globally.
Rory McIlroy falters as Brooks Koepka charges to Memphis win
Koepka, who started the final round one stroke behind McIlroy, finished at 16 under, with 264. "I didn't have a number in mind". Now Koepka has come from behind in three of his seven victories, though this time teeing off only a stroke off the lead.