With the analysis among 34 patents, we discovered top 29 key players by total patent application. Hitachi Ltd., Beckman Instruments, Inc., Ricoh Co., Ltd. are dominant in this area. They take 23.53% of the total patent filing.
California, United States
Patent: 3
Aichi-ken, Japan
Patent: 1
Fukushima-ken, Japan
Patent: 1
Toyama-ken, Japan
Patent: 1
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