7 Utility Patents
#2,162 in Saitama 343-0827
#121,668 in Japan
#597,499 in the World
Forward Citations = 248
Company Filing History:

Mitsubishi Mining and Cement Co. Ltd.
Nakagawa Sangyo Co., Ltd.
4. 1 out of 21,814

where one patent can have more than one assignee
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