The Federal Circuit overruled a district court’s claim construction, vacated the district court’s finding of infringement and remanded for further proceedings in light of the correct claim construction. The trial court erroneously used structures from the prior art references listed in the patent to provide a definition for “score lines” encompassing structures not disclosed expressly in the patent specification.
US 5312355 http://www.google.com/patents?vid=USPAT5312355
US 5125904 http://www.google.com/patents/about?id=Y78EAAAAEBAJ&d