How to carry out patent search? What are the methods of patent retrieval?

How to carry out patent search? The biggest role of patent retrieval lies in patent application and patent research direction. Patent retrieval plays a decisive role in the growth of enterprises and the saving and improvement of global productivity. So what are the methods of patent retrieval? How to carry out patent search? What are the methods of patent retrieval? How to carry out patent search? What are the methods of patent retrieval? There are three ways of patent retrieval: paper retrieval, software retrieval and online retrieval. Paper retrieval uses paper carrier, which is generally the most effective evidence, but the efficiency is low. Software retrieval uses magnetic media, which is fast, but the data capacity is limited and the update speed is limited. With the development of network technology, online patent resources are favored by users because of their unparalleled data advantages, convenient retrieval and no time and space constraints, and become the main way of patent retrieval. Online patent retrieval has gradually matured, and now online patent retrieval will become the most important and fastest retrieval method. Online search is fast and novel, but it has no legal effect. If it is to be used as evidence, relevant departments need to produce corresponding certificates, or download the certificates through legally recognized departments. China patents can be searched online through multiple websites, including paid websites and free websites. How to improve the recall of patent retrieval? 1. Flexible selection of retrieval field: For clear technical requirements, technical characteristic words can be entered in the invention name, abstract, claims, subject words and description options, and the retrieval scope can be gradually expanded to make the retrieval as complete and accurate as possible. 2. Expanding synonyms and hyponyms: There are many ways to expand synonyms, such as scientific or common names, abbreviations and full names, terms and codes. At the same time, we can browse, associate and abstract the preliminary retrieval results, find out the upper and lower concept words and expand the retrieval. 3. Refine word selection: Refine words with existing technical characteristics, try to choose words with relatively exact meanings and avoid polysemy. 4. Keywords and patent classification number: Use keywords and patent classification number to expand the search scope and filter junk information. 5. Clever use of the logical relationship of retrieval elements: First, do the basic homework of retrieval element list, and then use the combination of logical relationships to help you quickly sort out clues and list professional retrieval methods.