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By Alastair Sharp TORONTO (Reuters) – BlackBerry Ltd said on Friday it had filed a lawsuit against a company co-founded by American Idol host Ryan Seacrest that offers a physical keyboard that can be attached to some of Apple Incs touchscreen iPhone 5 models. The company, Typo Products LLC, is currently taking pre-orders for the $99 keyboard, which features angled miniature keys similar to those used on many of BlackBerrys devices. Canadas BlackBerry, a once dominant smartphone maker that has lost market share to the iPhone and other touchscreen devices, said Typos keyboard infringes its own design. We are flattered by the desire to graft our keyboard onto other smartphones, but we will not tolerate such activity without fair compensation for using our intellectual property and our technological innovations, Steve Zipperstein, BlackBerrys chief legal officer, said in a statement.