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

译者Jason，毕业于世界顶级翻译学院，擅长翻译各种与税务信贷融资及社区发展相关的法律文件。