A New York federal judge has ruled that DC Comics, owner of the Superman franchise, owns a valid trademark in "kryptonite" that can be protected from dilution and infringement by a bicycle lock company that adopted the name. Judge Richard Owen issued several summary judgment rulings favorable to DC Comics, but he refused to dismiss a claim that DC breached a contract on limited trademark use, leaving most of the issue for trial.
Putting a Legal Lock on 'Kryptonite'
New York Law Journal
September 22, 2004
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