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日期:2024-07-19
Patents have been granted in the United States on methods for doing business since the US patent system was established in 1790. The first financial patent was granted on March 19, 1799, to Jacob Perkins of Massachusetts for an invention for "Detecting .....
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日期:2024-07-17
5 Feb 2015 ... The Cooperative Patent Classification (CPC) effort is a joint partnership between
the United States ......
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日期:2024-07-14
1 Dec 2012 ... U.S. patents receive a mandatory classification for all claimed disclosure, that is,
the claims are read in ......
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日期:2024-07-15
10 Jul 2012 ... Class Numbers & Titles | Class ... Class
Schedule (HTML)...
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日期:2024-07-13
The United States Patent Classification is an official patent classification system
used and maintained by the United ......
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日期:2024-07-19
The United States Patent Classification (USPC) is fixed by the United States
Patent and Trademark Office (USPTO)....
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日期:2024-07-14
U.S. Patent Application Master Classification File (MCF). The U.S. Patent
Application Master Classification File contains ......