4 Utility Patents
#1 in Niiharu
#191,244 in Japan
Forward Citations = 38
Company Filing History:

Sumitomo Electric, Ltd.
Denryoku Chuo Kenkyusho
4. 1 out of 10
Kogyo Gijutsuin
5. 1 out of 3
Sumitomo Electric Indus.
where one patent can have more than one assignee
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