3 Utility Patents
#655 in Wakayama
#236,787 in Japan
Forward Citations = 21
Company Filing History:
Kabushiki Kaisha Yamamoto Suiatsu Kogyosho
Nihon Valqua Kogyo Kabushiki Kaisha
Sumitomo Kinzoku Kogyo Kabushiki Kaisha
4. 1 out of 929
Sumitomo Metal Industries, Inc.
5. 1 out of 42,451

where one patent can have more than one assignee
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