21 Utility Patents
#267 in Hitachi
#34,149 in Japan
#157,948 in the World
Forward Citations = 545
Company Filing History:


Hitachi Service Engineering, Ltd.
4. 2 out of 21
Nippon Telephone and Telegraph Corporation
5. 2 out of 6
Hitachi Service Engineering Co., Ltd.
where one patent can have more than one assignee
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