21 Utility Patents
#6,826 in Tokyo
#34,109 in Japan
#157,675 in the World
Forward Citations = 131
Company Filing History:
Mitsubishi Materials Silicon Corporation

Stanley Electric Co., Ltd
4. 1 out of 595
Sumco Corporation
5. 1 out of 90
Sumitomo Mitsubishi Silicon Corporation
where one patent can have more than one assignee
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