9 Utility Patents
#17,843 in Tokyo
#95,540 in Japan
#457,599 in the World
Forward Citations = 19
Company Filing History:
Sumco Corporation
Nitta Haas Inc.

4. 1 out of 629
Dainippon Ink and Chemicals, Incorporated
5. 1 out of 1
Sumico Corporation
where one patent can have more than one assignee
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