Kokusai's Patent Validity Determined in Dispute with Eugene Tech; Fourth Amendment Narrows Scope

Kokusai's patent was deemed valid by the Patent Court, but four amendments to its claims have narrowed its scope, making it challenging for Kokusai to prove infringement against Eugene Tech. The Patent Review Board partially invalidated Kokusai's '644 patent, ruling it partially valid, while Eugene Tech has appealed the decision. The dispute involves four patents, with Kokusai's claims facing ongoing legal challenges and potential reversals in court rulings.