With the analysis among 136 patents, we discovered top 22 key players by total patent application. NEC Corp., Fujitsu Ltd., Oki Electric Industry Co., Ltd. are dominant in this area. They take 66.91% of the total patent filing.
Tokyo-to, Japan
Patent: 47
Tokyo-to, Japan
Patent: 32
Oki Electric Industry Co., Ltd.
Tokyo-to, Japan
Patent: 12
Tokyo-to, Japan
Patent: 10
NEC Communication Systems Ltd.
Nippon Telegraph & Telephone Corp.
Mitsubishi Electric Corp.
Matsushita Electronics Corp.
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