54 Utility Patents
#10 in Hitachiota
#6,534 in Japan
#32,866 in the World
Forward Citations = 689
Company Filing History:

Hitachi Mitsubishi Hydro Corporation
Other
4. 1 out of 28
Hitachi Industrial Products, Ltd.
5. 1 out of 18
East Japan Railway Company
where one patent can have more than one assignee
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