Fig. 1. Patent status for each country
Fig. 2. Patent status for each technology category
Fig. 3. Patent status for main applicants
Fig 4. SNA graph by Correlation analysis for each technologies (a) Wireless Feeding and Collecting Technology (b) High-frequency Power Converter Technology (c) Orbital and Infrastructure Technology
Fig 5. Core word SNA graph for each technologies (a) Wireless Feeding and Collecting Technology (b) High-frequency power converter Technology (c) Orbital and Infrastructure Technology
Table 1. Top20 Keywords based on TF-IDF
Table 2 Degree of each keyword using SNA graph
Table 3. Correlations between Cores and linked words for each technologies
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