With the analysis among 272 patents, we discovered top 58 key players by total patent application. Siemens AG, STC Plc, Western Electric Co., Inc. are dominant in this area. They take 29.41% of the total patent filing.
Bayern, Germany
Patent: 41
Georgia, United States
Patent: 16
Noord-Holland, Netherlands
Patent: 7
New York, United States
Patent: 7
Nordrhein-Westfalen, Germany
Patent: 6
Telefonaktiebolaget LM Ericsson
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