Creating, using and protecting intellectual property rights is the core competitiveness of enterprises. Based on the construction of a patent data set of automotive lightweight manufacturing process, this article quotes patent asset index calculation method of PatentSight database. We focus on the two dimensions of technology value and market value and six indicators of technology life cycle, frequency of citations, number of classification numbers, country distribution, number of patents in the same family and patent validity to identify core patents. Then we compare them with the patent strength in the Incopat database. The results show that this method is consistent with the conclusions of existing mature analysis platforms, which can effectively evaluate the patent value. The research provides reference and guidance for the industrial layout and future development of enterprises to a certain extent.
Teng Fei, Lu Baofeng, Li Longfei, Qin Aning, Sun Yuling.
Research on Core Patent Identification Based on PatentSight: Take Automobile Lightweight Manufacturing Process as an Example[J].
Science Focus, 2021, 16(1): 73-81 DOI:10.15978/j.cnki.1673-5668.202101005
$\text { Cited index }=\sum_{1}^{n}\left(\frac{c 1}{\text { cited } 1 a v}+\frac{c 2}{\text { cited } 2 a v}+\ldots+\frac{c n}{\text { citednav }}\right)$
$\mathrm{IPC} \text { index }=\Sigma_{1}^{m}\left(\text { cited } a v_{I P C 1}+\text { citedav }_{I P C 2}+\ldots+\text { cited } a v_{I P C m}\right) / m$
$TR=\frac{\text { Cited index }}{\text { IPC index }}$
本文以科睿唯安Derwent Innovation Index专利数据库为检索平台,利用主题词和德温特手工代码组合的检索策略,截至2020年4月30日,共检索专利数量13 458项。专利检索策略为:((TS=(car* or automobile* or vehicle* or automotive) and TS=(light-weight or lightweight or lightening or ("weight reduction*") or ("reduce* weight"))) or (TS=auto lightweight)) And (TS= (manufactur* or “metal forming” or “shaping metal” or “Tailor welded blanks” or “Variable Thickness Rolled Blanks” or “Internal High Pressure Forming” or “Tube hydroforming” or “Hot stamping of ultra high strength steel” or “Roll forming” or “Semi-solid forming” or “high pressure die casting” or “low pressure die casting” or “Long Fiber reinforced Thermoplastics-Direct processing-In Line Compounding” or “LFT-D” or “Connection Technology”) or MAN=( Q11-A28 or Q16-D01 or Q51-M or Q52-M or X21-X20 or X22-X20A or P5 or P53-V03))