7 Utility Patents
#9,043 in Kanagawa
#121,668 in Japan
#597,499 in the World
Forward Citations = 243
Company Filing History:

Nippon Silica Glass Co., Ltd.
Tetronics Research and Development Company Ltd.
4. 1 out of 73
Japan As Represented by Director General of Agency of Industrial Science
5. 1 out of 1
Kondo Sylvania Ltd.
where one patent can have more than one assignee
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