3 Utility Patents
#1,194 in Sagamihara
#233,661 in Japan
Forward Citations = 22
Company Filing History:

Tosoh Quartz Corporation
Tosoh Sgm Corporation
4. 1 out of 1
Tosoh Smg Corporation
5. 1 out of 7
Nippon Silica Glass Co., Ltd.
where one patent can have more than one assignee
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