先用权是指专利申请前，已经有人做好制造或者使用的必要准备，则在批准申请人的专利权之后，上述人员仍可在原范围内继续制造或者使用的权利。
... 先申请制 first to file system 先用权 first using right 显而易见的发明 obvious invention ...
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Then it also discusses the legitimacy of the prior user right.
还讨论了先用权的正当性基础。
参考来源 - 专利先用权制度研究·2,447,543篇论文数据，部分数据来源于NoteExpress
专利侵权抗辩的法定免责事项包括专利权用尽、先用权、临时过境使用、专为科学研究和实验而使用以及善意使用等事由。
Patent infringement demur of the statutory exemption include exhaustion of patent rights, prior user rights, temporarily passing through, specifically experimental use, liable applications, etc.
提出先用LTS稳健估计来确定残差的初值，然后再进行选权迭代方法。
A new selecting weight iteration method is presented. It USES LTS robust estimate to ascertain the initial residuals value.
矿主的这种主张确立“先占先用”优先权，使他能够根据需要尽量用水。
The miner's claim established a "first-in-time, first-in-use" priority allowing him to take as much water as he required.
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