7 Utility Patents
#22,017 in Tokyo
#121,185 in Japan
#592,813 in the World
Forward Citations = 138
Company Filing History:

Nippon Kokan K.k.
where one patent can have more than one assignee
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#22,017 in Tokyo
#121,185 in Japan
#592,813 in the World
Company Filing History:

Get your Inventor Badge Today