x patent

X-patent. Patents. An early U.S. patent, granted before the numbering system set up in the Patent Act of 1836 and so named because an X was added to the numbers of existing patents to avoid duplicate numbers.

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词条贡献者

资深译员Michael，毕业于一所培养高级翻译以及跨文化事务专家的精英大学，专注翻译各种与商业地产租赁有关的法律文件。