The company is now accusing Apple of stealing confidential information and trade secrets in order to aid Qualcomm rival Intel Corp. (INTC - Get Report) in a filing on Tuesday with the Superior Court of California.
Qualcomm hopes the court will add the new allegations to its ongoing lawsuit against Apple for allegedly breaching the Master Software Agreement the two companies signed in 2010.
"Apple has engaged in a years-long campaign of false promises, stealth, and subterfuge designed to steal Qualcomm's confidential information and trade secrets for the purpose of improving the performance and accelerating the time to market of lower-quality modem chips, including those developed by Intel," Qualcomm said in its court filing. "Apple used that stolen technology to divert Qualcomm's Apple-based business to Intel."
In November, Qualcomm accused Apple of violating the agreement because it didn't allow Qualcomm to periodically ensure that the source code software that it was sharing with Apple was being appropriately protected.Listen to TheStreet's Martin Baccardax and Tracy Byrnes talk tariffs, oil and interest rates below:
Qualcomm and Apple are currently embroiled in more than 70 lawsuits and countersuits globally. The rift between the former partners started when Apple accused Qualcomm of illegally using its dominance of the global phone chip market to charge exorbitant licensing fees.
Following the dispute, Apple now uses Intel chips and modems to connect its newest iPhones to cellular networks. Qualcomm is now accusing Apple of using Qualcomm know-how to fine tune Intel's hardware to help the performance of its chips.
This is not the first time Qualcomm has brought these allegations against Apple. The U.S. International Trade Commission last week threw out these claims after Qualcomm raised them.
When asked for comment, Apple pointed TheStreet to a June 26 open session with the International Trade Commission where two judges dismissed Qualcomm's claim that Apple fed information to Intel due to lack of evidence with ITC Administrative Law Judge Thomas B Pender saying that "I'm not considering that argument... if there had been some smoke there, I would have seen it," according to a copy of the court transcript seen by TheStreet.
Qualcomm shares are down 0.8% Tuesday afternoon, while Apple shares are up 0.5% and Intel was down 1.8%.
Editor's Note: Story has been updated to include further details about Apple and Qualcomm's dispute in front of the International Trade Commission.