With the analysis among 40 patents, we discovered top 22 key players by total patent application. General Electric Co., Thorn EMI Plc, Apl Inc. are dominant in this area. They take 30.00% of the total patent filing.
Massachusetts, United States
Patent: 4
New York, United States
Patent: 3
California, United States
Patent: 3
Pennsylvania, United States
Patent: 3
Noord-Holland, Netherlands
Patent: 3
New York, United States
Patent: 2
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