28 Utility Patents
#1,615 in Yokohama
#22,052 in Japan
#102,774 in the World
Forward Citations = 405
Company Filing History:
Ohi Seisakusho Co., Ltd.
Mitsui Kinzoku Act Corporation
Mitsui Mining & Smelting Company, Ltd.
4. 1 out of 832,575 patents
Other
5. 1 out of 13,344

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