55 Utility and 2 Design Patents
#526 in Yokohama
#6,294 in Japan
#31,701 in the World
rank by utility patentsForward Citations = 1,109
Company Filing History:

Kokusan Kinzoku Kogyo Co., Ltd.
Ohi Seisakusho Co., Ltd.
4. 5 out of 33
Kokusan Kinzoku Kogyo Kabushiki Kaisha
5. 1 out of 197

where one patent can have more than one assignee
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