My guess is the case was dismissed without prejudice because it's a royalty-bearing arrangement and if EDIG ever suspects Wolverine isn't providing us with factual data on their sales revenue, we can go back to court and sue again.

Under the terms of the confidential agreement, Wolverine has agreed to make an undisclosed lump sum payment for past infringing sales and to pay a royalty for any on-going sales of products that practice e.Digital’s U.S. Patent 5,491,774 ('774).