1. Paper retrieval: Paper carrier is the main form of patent literature and the main object of retrieval. The main advantages: the paper retrieval method is the least prone to mistakes and the most evidence-effective. However, the process of patent retrieval is inefficient, time-consuming and laborious, easy to lose, and the printing and distribution cycle is long, and it is aimed at the latest information retrieval.
(1) field retrieval:
The system provides 16 retrieval fields. Users can choose from 16 search items according to known conditions, and can perform single-field search or multi-field limited search. Each search field can be searched by fuzzy method, and any letter, number or word can be represented by% (which must be in half-width format); Multiple fuzzy character can be used, and that first position can be omit anywhere the search string is entered.
(2)IPC classification retrieval
IPC classified navigation retrieval refers to the use of various departments, categories and subcategories in the IPC category table to gradually query the category of interest, and click on the name of this category to get the patent retrieval results under this category (except design).
IPC classified navigation retrieval also provides keyword retrieval, that is, keyword retrieval is carried out within the scope of invention names and abstracts under a certain category to improve the retrieval accuracy.
2.IncoPat scientific and technological innovation information platform
3. China Patent Information Network
4. Patent Exchange -patenthub Patent Search Engine
5. China Intellectual Property Network
6.innojoy patent search engine
7.Baiteng.com patent retrieval system.
8. Patent Star-Patent Retrieval System
9.SOOPAT patent search engine
10, PatSnap intelligent bud patent retrieval system