6 Utility Patents
#997 in Hitachi
#137,677 in Japan
#680,089 in the World
Forward Citations = 59
Company Filing History:

Hitachi Engineering Co., Ltd.
where one patent can have more than one assignee
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#997 in Hitachi
#137,677 in Japan
#680,089 in the World
Company Filing History:

Get your Inventor Badge Today