Direct from HTC's press release
Seattle – May 12, 2010 – HTC Corporation today took legal action against Apple Inc., filing a complaint with the United States International Trade Commission (ITC) to halt the importation and sale of the iPhone, iPad and iPod in the United States.
In response to the suit Apple filed against HTC in March, HTC is now countersuing, claiming that Apple is infringing on five of its patents. We're still digging for more details, but the press release mentions that HTC believes the mobile industry should be driven by competition and innovation. Sounds like a jab at the whole state of the current US patent process as well as Apple's lawsuit to me. How much (or how little) this will affect consumers remains to be seen, but rest assured that as soon as we know more, you will too.
HTC also has a new promo video for their "quietly brilliant" campaign backing up their message, it's after the break. That tagline is looking more and more inspired as this fight with Apple heats up.