发明专利的期限是多少年？-法律综合法律援助-法律咨询免费平台-国际律师联盟

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问题	发明专利的期限是多少年？
释义	法律分析：根据有关法律法规，发明专利的有效期为二十年。每年应缴纳专利年费，以保持专利的有效性。专利权人在授予专利权的年度后未缴纳年费或者缴纳的金额不足的，专利权人应当自应当缴纳年费之日起最迟六个月内补缴，同时缴纳滞纳金。法律依据：《中华人民共和国专利法》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	变更子女抚养权的程序是什么变更孩子的抚养权需要什么手续? 子女抚养权怎么变更变更子女抚养权有哪些规定父母变更抚养权需要什么手续和条件？民法典规定抚养关系如何变更民法典规定可否协商变更抚养关系民法典中怎样变更抚养关系有效民法典中抚养关系如何变更民法典规定怎样变更抚养关系有效民法典中双方协议变更抚养关系是否需起诉民法典中抚养关系能否协议变更？民法典中抚养关系能否协议变更法律问题民法典中抚养关系能否合同变更？民法典变更抚养权民法典关于变更抚养权的规定是什么？抚养权变更协议是否有必要写民法典变更抚养权的条件民法典规定抚养权怎样变更民法典中变更抚养关系能否同时请求抚养费夫妻共同申请房产证名字变更需要什么材料夫妻房产证更名需要哪些资料? 夫妻房产证更名需要哪些资料？夫妻房产名字变更需要什么手续？夫妻之间可以变更房产证姓名吗 system of signature by the legal representative system of single imprisonment system of social consultancy and dialogue system of socialist laws system of sole-judge proceedings system of special recognition system of special responsibility for each person system of statistical report system of supervision over administration system of supervision over withdrawal of cases system of suspended pronouncement of sentence system of suspended prosecution system of suspension in combat situation system of taking turns system of tax division between central and local governments system of the board of directors system of the congress of staff and workers system of the court of second instance being the final instance system of the economic responsibilities of enterprise system of the economic responsibilities within an enterprise system of the law of reform through labor system of the third instance as the final system of three councillors of state and nine cabinet ministers in the Qin and Han dynasties. 剥削制度薄惩

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