With the analysis among 145 patents, we discovered top 69 key players by total patent application. Fujitsu Ltd., Koninklijke Philips NV, International Business Machines Corp. are dominant in this area. They take 17.93% of the total patent filing.
Tokyo-to, Japan
Patent: 11
Noord-Holland, Netherlands
Patent: 9
New York, United States
Patent: 6
Illinois, United States
Patent: 4
Chungcheongbuk-do, South Korea
Patent: 4
California, United States
Patent: 4
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