Qualcomm has asked two German courts to suspend sales of iPhones, alleging they infringe on its patents, while four Apple contractors from which Qualcomm had sought patent license fees have filed antitrust complaints against the chip vendor.

Qualcomm went on to sue the four, Hon Hai Precision Industry, Wistron, Compal Electronics and Pegatron, for non-payment of the license fees, prompting them to file a complaint late Tuesday accusing the company of antitrust violations.

After suing the suppliers, Qualcomm went on to sue Apple itself, asking the U.S. International Trade Commission and the District Court for the Southern District of California on July 7 to stop imports and sales of recent iPhones, alleging that they infringe six of its patents issued within the last four years.

It filed similar complaints at patent courts in Munich and Mannheim, Germany, on Wednesday, seeking damages and a ban on Apple’s sale and importation of the latest iPhones in Germany.

One of the largest markets in Europe, Germany is also a logistics hub for imports and distribution across the continent.

The two patents at issue in Germany are understood to cover techniques for extending battery life by adapting a phone’s transmission capabilities to the data being sent, whether that be video, text or voice. U.S. patent number 8,698,558, issued in 2014, covers the extension of battery life by building intelligence into the system so the antenna is always using just the right amount of battery power to transmit, while U.S. patent number 9,608,675, issued in 2017, covers the sending of high speed data such as live video in a power-efficient way by combining multiple carriers.

The author is a Patent specialist from MR Technollect Solutions (www.MRTechnollect.com)