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

法律翻译Gwen，毕业于新加坡知名法学院，专注翻译各类与劳工、雇佣及移民有关的法律文件。