12 Utility Patents
#13,238 in Tokyo
#69,652 in Japan
#326,523 in the World
Forward Citations = 57
Company Filing History:

Mitsubishi Materials Silicon Corporation
Sumco Corporation
4. 1 out of 255
Research Development Corporation of Japan
5. 1 out of 73
Zaidan Hojin Handotai Kenkyu Shinkokai
where one patent can have more than one assignee
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