1. China Patent Publication Announcement of the State Intellectual Property Office
Log in to the China Patent Publication Announcement website of the State Intellectual Property Office of China at http://epub.sipo.gov.cn/index.action, and select different search methods according to needs, such as IPC classification search, LOC classification search, transaction data search and other search methods.
2. US Patent and Trademark Office
Step 1: Log in to the website of the US Patent and Trademark Office at http://www.uspto.gov/, and click “PatFT|AppFT” in the “Patents” drop-down menu to search for patents.
Step 2: Click “PatFT| AppFT” to enter the search interface, and select any option in the drop-down menu of “Field1” to search.
3. European Union Patent (EPO)
Step 1: To search for registered designs, directly enter the website of the European Union Intellectual Property Office at https://euipo.europa.eu/ohimportal/en/home, and then click “eSearch plus” (which includes all patent information including designs).
Step 2: Search for patents, go to the European Patent Office website https://www.epo.org/index.html, select direct search or click “Espacenet-patent search”.
IV. World Intellectual Property Organization
1. International Patent System (PCT)
Directly log in to the World Intellectual Property Organization patent search website https://patentscope2.wipo.int/search/en/search.jsf., and select the patent number in the drop-down menu.
2. Hague International Design System
Directly log in to the World Intellectual Property Organization Hague International Design System website http://www.wipo.int/designdb/hague/en/ to search, click “Numbers”, and enter the product number to search.
V. Hong Kong Patents and Registered Designs
Step 1: Log in to the Hong Kong Patent Online Search System http://ipsearch.ipd.gov.hk/index.html, and click “Search for Patents” or “Search for Designs”.
Step 2: Select Quick Search and enter the patent application number to search. For registered designs, enter the number to search.