In March, a patent holding company led by lawyer Donald Stout won a $612 million settlement from the maker of the BlackBerry email device in a patent-infringement case. Mr. Stout celebrated with a three-week hunting trip to New Zealand, where his good fortune continued. With a bow and arrow, he killed a rare red stag. Now Mr. Stout is himself in the sights of claimants who accuse him of getting more than his fair share of the money. At the center of the dispute is a long-defunct company called Telefind Corp. involved 16 years ago with creating the email patents ... .