LeapFrog Enterprises Inc., maker of the LeapPad educational toy line, has sued Mattel Inc.’s Fisher-Price Inc., sparking a patent-infringement battle over talking books that are expected to be hot ...

Here's proof that the courtoom is just a few steps removed from the schoolyard: LeapFrog, the toy company that jumped out of nowhere (with a little help from ex-con junk-bond king Michael Milken) to ...

A federal judge declared a mistrial Friday in LeapFrog Enterprises Inc.’s lawsuit seeking $58 million from Mattel Inc.’s Fisher-Price unit over a patent for interactive books that help children learn ...

SAN FRANCISCO (MarketWatch) -- LeapFrog Enterprises Inc. said Tuesday evening that it and Fisher-Price have agreed to have a patent dispute decided by a federal court judge after a jury in Delaware ...