23 Utility Patents
#474 in Nagoya
#29,888 in Japan
#138,545 in the World
Forward Citations = 36
Company Filing History:

Tanaka Kikinzoku Kogyo K.k.

4. 3 out of 217
Dowa Mining Co., Ltd.
5. 1 out of 832,575 patents
Other
where one patent can have more than one assignee
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