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问题	专利有效期多少年
释义	法律分析：对于专利的有效期多久这个问题，不同的专利期限不同。发明专利权的期限为20年，实用新型专利权和外观设计专利权的期限为10年，均自申请日起计算。法律依据：《中华人民共和国利法》第四十二条发明专利权的期限为二十年，实用新型专利权和外观设计专利权的期限为十年，均自申请日起计算。
随便看	法定的结合犯包括什么掩饰犯罪所得罪量刑处罚? 掩饰犯罪所得罪如何量刑? 采取刑事强制措施一定就是犯罪吗绑架罪既遂处罚标准细分? 绑架罪的加重情节研究绑架罪和抢劫罪的界限是怎样的绑架罪犯罪量刑标准哪些是刑事强制措施啊刑法强制措施包括什么绑架罪的法益及适用是什么？绑架罪的法益及适用是怎样的绑架罪和故意伤害罪区别是什么参与绑架罪量刑标准绑架未遂量刑标准绑架未遂者如何量刑绑架罪故意伤害既遂的判罚是什么？强奸犯怎样才能减刑强奸犯减刑 -法律知识罚金刑的实施方法有哪些怎样准确认定绑架罪绑架罪如何定性？绑架犯人如何定罪不属于刑事强制措施的是刑事案件中强制措施是否为必要条件 controversy over infringement of copyright controversy over infringement of patent right controversy over infringement upon a citizen's right to honor controversy over infringement upon a citizen's right to name controversy over infringement upon a citizen's right to portrait controversy over infringement upon a legal person's right of honor controversy over infringement upon a legal person's right to name controversy over infringement upon a legal person's right to reputation controversy over infringement upon the right of discovery controversy over infringement upon the right of invention controversy over infringement upon the right to name of a private partnership controversy over infringement upon the right to name of a self-employed business household controversy over injuries caused by a person of no civil disposition capacity controversy over injuries caused by improper necessity controversy over injuries caused by workers and staff members of enterprises or institutions controversy over injuries caused in unjust enrichment controversy over injuries inflicted upon others by a person with qualified civil capacity controversy over injury and damage caused by unjustified self-defense controversy over invasion of a citizen's right to reputation controversy over joint and cooperative management controversy over land ownership controversy over licensed exploitation of patents controversy over loans controversy over maintenance controversy over maritime tort

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