With the analysis among 105 patents, we discovered top 22 key players by total patent application. RCA Corp., International Business Machines Corp., Koninklijke Philips NV are dominant in this area. They take 33.33% of the total patent filing.
California, United States
Patent: 13
New York, United States
Patent: 11
Noord-Holland, Netherlands
Patent: 11
New York, United States
Patent: 4
Pennsylvania, United States
Patent: 3
Pennsylvania, United States
Patent: 3
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