The US-based mighty chipmakers, Qualcomm has filed three new patent infringement complaints against Apple. The chipset company alleged that Apple was using 16 more of its patents on iPhones.

The all three cases have been filed this Thursday. All of them were filed in U.S. District Court for the Southern District of California in San Diego. One of the cases is a companion civil lawsuit to a new complaint also filed with the ITC that seeks the same remedy of banning iPhones with Intel chips. The other two cases are civil patent infringement lawsuits, as per Reuters reported.

The latest complaints outline the new development in a prolonged dispute and follow Apple’s countersuit on Wednesday against Qualcomm, which alleged that Qualcomm’s Snapdragon mobile phone chips infringed on Apple patents.

However, Apple hasn’t responded yet to the new cases, referring to its earlier claims in its Wednesday filing that the company has developed its own technology and patents to power its iPhones.

In July, Qualcomm accused Apple of infringing numerous patents related to assisting mobile phones to get better battery life.

That case characterized a complaint with the U.S. International Trade Commission attempting to ban the import of Apple iPhones that use competing Intel Corp chips because of the alleged patent violations.

According to Reuters, The dispute between Apple and Qualcomm over patents is part of a wide-ranging legal war between the two companies.

Earlier this year, Apple sued Qualcomm for nearly $1 billion in patent royalty rebates that Qualcomm allegedly withheld from Apple. In a related suit, Qualcomm sued the contract makers that manufacture Apple’s phones, but Apple joined in to defend them.

Retaliating Apple, Qualcomm sued Apple in November over an alleged breach of a software agreement between the two companies. Apple emailed Qualcomm to request “highly confidential” information about how its chips work on an unidentified wireless carrier’s network, Qualcomm alleged, but Apple had copied an Intel engineer in the email for information.

Apart from it, Qualcomm is facing a lawsuit from the U.S. Federal Trade Commission over many of the same pricing practices Apple names in its complaints.

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