With the analysis among 44 patents, we discovered top 28 key players by total patent application. Matsushita Electronics Corp., SANYO Electric Co., Ltd., Hitachi Ltd. are dominant in this area. They take 34.09% of the total patent filing.
California, United States
Patent: 6
New York, United States
Patent: 2
Nagano-ken, Japan
Patent: 2
Toyama-ken, Japan
Patent: 1
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