A US federal judge certifies a class-action lawsuit accusing Apple of monopolizing the market for iPhone apps by banning digital purchases outside its App Store (Jonathan Stempel/Reuters)

Jonathan Stempel / Reuters:

A US federal judge certifies a class-action lawsuit accusing Apple of monopolizing the market for iPhone apps by banning digital purchases outside its App Store  —  A federal judge on Friday said tens of millions of Apple (AAPL.O) customers can pursue a class action accusing the company …