Apple (AAPL) - Get Report and Qualcomm (QCOM) - Get Report  hardly have the smoothest of working relationships, which was only exacerbated earlier this year when Apple hit the chip maker with a $1 billion lawsuit over patent royalties.

Apple then took another shot at Qualcomm when it alleged that the company's business practices were illegal.

Now Qualcomm has fired back with a statement from its legal team. The tone of the letter is anything but cordial.

"Apple is trying to distract from the fact that it has made misleading statements about the comparative performance of its products, and threatened Qualcomm not to disclose the truth," Qualcomm executive VP and general counsel Don Rosenberg said.

Qualcomm says Apple is distorting the truth in its description of the company's technological contributions.

"Apple says Qualcomm's innovations are limited to technology implemented in the cellular modem, when Apple knows well that Qualcomm has been the de facto R&D arm of the industry. Qualcomm's patented inventions make possible not only connectivity and high-speed data transmission across mobile networks, but also high-precision GPS navigation, app store operations, power management and battery efficiency, mobile video including advanced compression, graphics, camera imaging and facial-recognition technology, audio quality and audio file compression, and much, much more," Rosenberg continued.

Qualcomm added that its "innovations are at the heart" of every iPhone and allow for the most important and popular functions of the device.

Shares of Qualcomm fell 0.8% to $56.33 by Wednesday's close.

What's Hot On TheStreet

Alibaba's Jack Ma woos Detroit: TheStreet has spent the past two days in Detroit covering Alibaba's (BABA) - Get Report big hiring event in Detroit. We have had the opportunity to talk with Alibaba and take in how the Chinese tech company plans to grow jobs in America. But the real showstoppers have been the presentations with Alibaba's executive chairman Jack Ma, who as always hasn't been short on bold proclamations.

Said Ma in a keynote address Tuesday evening, "If you don't sell products in China, you will miss the future." Ma and other Alibaba executives have also sought to downplay the comparison to Amazon (AMZN) - Get Report . After spending a few days in Alibaba land, you understand where they are coming from. But, you are also reminded of how dominant Amazon is in the United States in so many categories (one soon to be organic food via Whole Foods (WFM) ).

Tesla mania continues: Tesla's (TSLA) - Get Report market cap is $60 billion and growing. At this point, Wall Street's obsession with all things Tesla has gotten out of control. Thestreet's Annie Palmer drills down into news Tesla could be opening a car-making plant in China. The last thing President Trump needs is a fight with Elon Musk on this one, Palmer reports.

Uber's embattled founder resigns: Uber Technologies Inc. founder and CEO Travis Kalanick has resigned from the ride-sharing company, TheStreet reports. The move comes just days after he was asked to take a leave of absence in the wake of a report into allegations of discrimination and bullying at the world's startup.

"I love Uber more than anything in the world and at this difficult moment in my personal life I have accepted the investors request to step aside so that Uber can go back to building rather than be distracted with another fight," Kalanick said in a statement given to the New York Times, which originally reported his departure.

Here is what Uber co-founder Garret Camp had to say this week about Uber's culture.

Check out TheStreet's new series: TheStreet has officially launched a new video series called Alpha Rising, where we will showcase all of the amazing women in business. TheStreet's Tracy Byrnes sits down with some of the top women kicking butt in business such as Birchbox' CEO Katia Beauchamp, who revolutionized the beauty business.

Apple is a holding in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio. Want to be alerted before Cramer buys or sells AAPL? Learn more now.

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