communitynews - 6:29 am on Feb 20, 2005 (gmt 0)

A court held that a book of trivia questions based on the television show Seinfeld was substantially similar to the show itself and therefore could be treated as a “copy” of Seinfeld. The court also held that the trivia book damaged the producers market for derivative works. Even though the producers hadn’t explored the market for trivia books based on the show in any way, they might do so in the future.

Now it very may well be that many people wanted a bunch of trivia questions about Seinfeld but this didn't allow someone to create it.