NEW YORK (BLOOMBERG) - TikTok and its parent ByteDance sued rival Triller Inc, asking a US judge to clear up a "cloud" over the China-based popular video-streaming app after Triller accused it of using its technology without permission.

ByteDance is in talks to sell parts of its TikTok unit in a deal that could be worth tens of billions of dollars after US President Donald Trump moved to ban its US operations over national security concerns.

The case filed on Wednesday (Oct 28) in San Francisco federal court is a response to a patent-infringement suit Triller filed against ByteDance in late July in Waco, Texas, a hub for complaints by patent owners looking for a friendly judge and quick litigation.

Representatives of Triller and ByteDance didn't immediately respond to requests for comment.

Triller's allegations against TikTok and its users "cast a cloud" over ByteDance's business, according to the complaint. ByteDance is seeking a court order that it, its products and its users don't infringe the patent and that none of them are liable for damages or injunctive relief.

The patent, issued in June 2017 and assigned to Brooklyn-based Mibblio Inc, covers systems and methods for creating music videos synchronized with an audio track. Triller, in its Texas complaint, said it owns the patent. ByteDance says TikTok doesn't perform the steps covered by the patent.

A showdown over the Trump's administration's attempt to ban TikTok, which a federal judge in late September temporarily blocked, is slated for a Dec 14 argument in the US Circuit Court of Appeals in Washington. The company two weeks ago asked a federal judge to block a broad set of government restrictions designed to curb use of the Chinese-owned video-sharing app in the US.

San Francisco-based Fastly Inc, which runs a content delivery network that pushes data quickly around the internet, said on Wednesday that ByteDance pulled most of its TikTok traffic from its network. In a letter to shareholders, Fastly tagged the reduction as a "response to the potential of a prohibition of US companies being able to work with this customer.

Triller is in talks with blank-check acquisition companies about a merger that would take the company public, Reuters reported this month.