Mattel, a toy company based in Emeryville, California, has filed a lawsuit against Fisher-Price, alleging that the company is infringing on Mattel's 1998 patent for interactive learning books for toddlers and preschoolers.
The Emeryville-based toy company filed suit Friday claiming Fisher-Price is violating its 1998 patent on interactive-learning books for toddlers and preschoolers .