6 Utility Patents
#313 in Nirasaki
#137,033 in Japan
#670,791 in the World
Forward Citations = 191
Company Filing History:


Seiwa Optical Co., Ltd.
where one patent can have more than one assignee
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#313 in Nirasaki
#137,033 in Japan
#670,791 in the World
Company Filing History:


Get your Inventor Badge Today