Taiwan-based smartphone maker HTC has launched at lawsuit claiming Apple is violating patents it possesses.
The patents in question were recently sold to HTC from Google, according to a Bloomberg report.
HTC acquired the nine patents last weeks, according to the report, although neither company is commenting on the matter.
Google had been accused of sitting on the sidelines as technologies used in its Android operating system came under attack from Apple's lawyers. Motorola Mobility, Barnes & Noble and Samsung Electronics have all come under fire from Apple, claiming abuse of its patents.
Now HTC's complaint deposited at federal court in Delaware, claims infringement by Apple of four patents, all of which were transfered to HTC on August 29th according to patent agency records.
A further five patents are mentioned in HTC's complaint to the regulator, the Federal Trade Commission.
In a statement, HTC General Counsel Grace Lei said:. “We believe that we have an obligation to protect our business, our industry partners and our customers, who love using our products.”