9 Utility and 2 Design Patents
#1,661 in Saitama 343-0827
#95,540 in Japan
#457,599 in the World
rank by utility patentsForward Citations = 20
Company Filing History:
Mitsui Mining & Smelting Company, Ltd.
Nihon Dempa Kogyo Co., Ltd.

where one patent can have more than one assignee
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