With the analysis among 71 patents, we discovered top 31 key players by total patent application. NEC Corp., Matsushita Electronics Corp., Telefonaktiebolaget LM Ericsson are dominant in this area. They take 39.44% of the total patent filing.
Tokyo-to, Japan
Patent: 13
Osaka-fu, Japan
Patent: 11
Telefonaktiebolaget LM Ericsson
Aichi-ken, Japan
Patent: 4
Shizuoka-ken, Japan
Patent: 4
Kanagawa-ken, Japan
Patent: 3
Toyama-ken, Japan
Patent: 2
California, United States
Patent: 2
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