18 Utility Patents
#326 in Hitachi
#40,952 in Japan
#186,885 in the World
Forward Citations = 166
Company Filing History:
Hitachi, Ltd.
Hitachi Koki Co., Ltd.
Other
4. 1 out of 129
Ricoh Printing Systems, Ltd.
5. 1 out of 836

where one patent can have more than one assignee
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