index to the us patent classification system

Index to the U.S. Patent Classification System. An entry-level aid to using the Patent Office’s classification system, comprising an estimated 65,000 common terms and phrases and referring each entry to a class and subclass within the system.

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词条贡献者

译者大智，毕业于一所旨在培养高级翻译专业人才的翻译院校，擅长翻译各种与环境保护相关的法律文件。