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After 20 years, a St. Louis company may finally get its chance to prove that the Pentagon used its technology to make stealth combat aircraft stealthy without paying for it.
An appeals court on Friday revived a patent-infringement suit that Zoltek Corp. first filed in March 1996. The court said a judge erred in ruling the patent invalid, and ordered a hearing on whether the F-22 fighter plane and B-2 bomber used a Zoltek invention.
The U.S. government is invoking the military and state secrets privilege on the advanced aircraft and their classified technology, contending it must keep information about them from being disclosed to protect national security.