6 Utility Patents
#302 in Kamakura
#139,573 in Japan
#695,828 in the World
Forward Citations = 93
Company Filing History:
Kokan Kako Co., Ltd.


4. 1 out of 1
K. K. Tube Forming
5. 1 out of 1
Yanagawa Seiki K.k.
where one patent can have more than one assignee
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