manual of classification

Manual of Classification. Patents. The U.S. Patent and Trademark Office’s official looseleaf publication describing the patent classification system and giving brief explanations of each class and subclass within the system.

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词条贡献者

资深译员Betty，毕业于亚洲一流的高级翻译学院，专注翻译各种与商业移民有关的法律文件。