united states patent classification system的相關公司資訊
Overview of the U.S. Patent Classification System (USPC)

Overview of the U.S. Patent Classification System (USPC)

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日期:2026-04-20
2012年12月1日 - Overview of the U.S. Patent Classification System (USPC). 1.1 The USPC. The USPC is a system for organizing all U.S. patent documents and ......看更多