A few months ago, Nokia sued Apple over phone technology infringement, but now Apple is suing HTC for allegedly infringing 20 patents “related to the iPhone’s user interface, underlying architecture, and hardware.”

The said lawsuit was filed by Apple concurrently with the U.S. International Trade Commission (ITC) and in U.S. District Court in Delaware.

“We can sit by and watch competitors steal our patented inventions, or we can do something about it. We’ve decided to do something about it,” said Steve Jobs, Apple’s CEO. “We think competition is healthy, but competitors should create their own original technology, not steal ours.”

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