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Patent activity analysis of vibration-reduction control technology in high-speed railway vehicle systems in China


Patent activity in China for vibration-reduction control technology in high-speed railway vehicle systems was analyzed based on a portfolio of 193 patents or applications from the State Intellectual Property Office of the People’s Republic of China official Web-based database and a search of the World Intellectual Property Organization PCT database. Patent activity features such as timing, applicant, technology classification, technical themes, and patents in force were obtained and analyzed. As a further stage of research, patent data on locomotive wheel sets were analyzed by means of a matrix analysis of problems and technologies. The main statistical information and conclusions include estimating the development stage, discovering the distributions of applications and applicants, weighing the roles played by major applications, determining R&D hotspots, and providing a better understanding of domestic patent activities in this field. Policy implications for innovation-related domestic R&D institutions in the technologies under study were proposed based on the analytical results.

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  1. State Intellectual Property Office of People’s Republic of China. Available from

  2. Data including published patent documents from Apr.1st 1985 to Feb. 5th 2011 as the unpublished patent or confidential patent documents are excluded.



  5. For the reason of deferred examination of patent application, the number of published application in year of 2009 is a partial file of the year.

  6. The national average cited in the paper was calculated based on data from SIPO Annual Reports unless otherwise stated.

  7. Section B: Performing operations; transporting.

  8. In accordance with the patent law of China, an institution or an individual may file a patent application.

  9. The Article 20, Paragraph 1 of Patent law of the People's Republic of China, 2000.

  10. In accordance PCT, the applicant in an international application under PCT fulfill the requirements of entering the Nation Phase within 32 months of the earliest priority date if the application is planned to be grant by a specific authority.


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I am very grateful to the technical experts and patent agents for providing the technical information and help. Also, I deeply appreciate the financial supports to this research from the Fundamental Research Funds for the Central Universities from Ministry of Education, No. SWJTU09BR276.

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Correspondence to F. Zhang.

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Zhang, F., Zhang, X. Patent activity analysis of vibration-reduction control technology in high-speed railway vehicle systems in China. Scientometrics 100, 723–740 (2014).

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  • High speed railway
  • Vibration reduction
  • Chinese patent intelligence analysis
  • Patent map