遭遇无效请求或被竞对专利阻击的企业
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国际专利无效是利用各国法定程序挑战或捍卫专利效力的攻防手段：欧洲专利授权公告后9个月内任何人均可提出异议，美国可经IPR多方复审挑战专利有效性，日本、韩国设无效审判程序。企业既可能作为权利人组织答辩，也可能作为挑战方扫清市场障碍。
遭遇无效请求或被竞对专利阻击的企业
欧专局异议自授权公告起9个月内，其余视国别而定
当地律师+恒程顾问协同代理
视目标国程序与排期而定
可先准备与国际专利无效宣告及答辩相关的基础材料与背景信息。资料不完整时，也可从一次初步沟通开始。无效程序的期限、理由与证据规则因国别而异，错过异议或复审窗口即丧失程序机会。
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