    Sentence 1: The Emeryville-based toy company filed  suit Friday in federal court in Wilmington , Del . .  claiming Fisher-Price is violating its 1998 patent on  interactive learning books for toddlers and preschoolers         Sentence 2 The Emeryville-based toy company filed  suit Friday claiming Fisher-Price is violating ts 1998  patent on interactive-leaming books for toddlers and  preschoolers .    