" We can 't change the past , but we can do a lot about the future , " Sheehan said at a news conference Wednesday afternoon .
" We can 't change the past , but we can do a lot about the future , " Sheehan said hours after arriving in Phoenix .
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 .