2 Utility and 16 Design Patents
#386 in Tokyo
#1,177 in Japan
#11,981 in the World
rank by design patentsForward Citations = 248
Company Filing History:
Hitachi, Ltd.
4. 1 out of 129
5. 1 out of 34
Hitachi Keiyo Engineering Co., Ltd.
where one patent can have more than one assignee
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