China 
Africa 
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How to use databases in patent search
Published in Nelson Durán, Leandro Carneiro Fonseca, Amedea B. Seabra, Intellectual Property in Chemistry, 2018
Nelson Durán, Leandro Carneiro Fonseca, Amedea B. Seabra
The access to the Google Patents database can be done through https://patents.google.com. This platform is useful when we already know a specific patent we want to analyze or when we want to qualitatively search for documents through the use of general keywords.
Amplifier and Loudspeaker Protection
Published in Douglas Self, Audio Power Amplifier Design, 2013
Table 24.1 earlier in this chapter shows some interesting US patents in the field of amplifier protection. This is a very small selection from the large number that exist. They may be accessed free of charge through Google Patents.
A new academic impact metric for evaluating geographic simulation models
Published in International Journal of Digital Earth, 2022
Kai Xu, Min Chen, Albert J. Kettner, C. Michael Barton, Barry F.W. Croke, Anthony J. Jakeman, Daniel P. Ames, Hsiao-Hsuan Wang, Susan M. Cuddy, Songshan Yue, Yongning Wen, Fengyuan Zhang, Yixuan Zhang, Guonian Lü
Regarding papers, the Scopus database uses a three-level classification system to identify journal research areas. The first-level classification contains four categories: health, life, physical, and social sciences. The second-level classification distinguishes among the major disciplines of each of the first-level classifications. This classification divides the major disciplines into many specific research areas. The number of research areas in a journal in Scopus can vary from one to many. In Scopus, the research area of a paper is consistent with the research area of the corresponding journal. Regarding patents, the Google Patents Public database uses a cooperative patent classification scheme to classify patents according to their functions or applications. Regarding projects, Fun Research uses major disciplines, such as mathematics, physics, or geosciences, to distinguish scientific research projects. However, the cooperative patent classification system contains many functional classifications that cannot be converted into research areas, and the project classification system in Fun Research does not specify the detailed subdisciplines. Compared with the other two classifications, the Scopus classification method is detailed and fits well with the model subject area classification. Therefore, we used the subject areas from the Scopus database to classify the models. The studied models were more relevant to the geography and environmental research areas than to other areas. Thus, some classifications related to geography and the environment in Scopus were selected to identify the research areas of the models, and classifications with the same definitions were merged (Table 1). The third-level classifications were selected as the final model classifications.