Typo, the Ryan Seacrest-backed business responsible for developing the Typo Keyboard attachment designed to work with the iPhone, has responded to a recently-filed lawsuit by BlackBerry, the beleaguered Canadian smartphone manufacturer.

We are aware of the lawsuit that Blackberry filed against Typo Products. Although we respect Blackberry and its intellectual property, we believe that Blackberry’s claims against Typo lack merit and we intend to defend the case vigorously. We are excited about our innovative keyboard design, which is the culmination of years of development and research. The Typo keyboard has garnered an overwhelmingly positive response from the public. We are also looking forward to our product launch at the Consumer Electronics Show in Las Vegas next week and remain on track to begin shipping pre-orders at the end of January.

While Typo is set to make its official product launch at CES, the company opened its kimono a peek early last month. It's a slide-out keyboard that attaches to the iPhone 5 and 5s like a case, providing a QWERTY-layout thumbpad.

BlackBerry wasn't pleased. On Friday the company announced it had filed suit against Typo, calling the design "blatant infringement."

"...we will not tolerate such activity without fair compensation for using our intellectual property and our technological innovations," said BlackBerry's chief legal officer, Steve Zipperstein.

BlackBerry has a lot of patents for their smartphone keyboard designs, so they're not blowing smoke, but Typo looks like it's ready to fight. Should be interesting.