雀巢的 Nespresso 咖啡机创新之处在哪里？

雀巢的. Nespresso 咖啡机创新之处在哪里?是什么原因被欧洲专利局撤销了专利?

European Regulator Revokes Patent Covering Lucrative Nespresso System

Nestlé Has Patent for Nespresso System Revoked

苦于没有注册 WSJ ....看不到详情，有人可以说说嘛?谢谢了!