34 Utility Patents
#3,478 in Tokyo
#16,025 in Japan
#75,353 in the World
Forward Citations = 1,061
Company Filing History:

Hitachi Chemical Company, Ltd.
Nippon Telegraph and Telephone Public Corporation
4. 1 out of 87
Kasei Optonix, Ltd.
5. 1 out of 1,112
Hitachi Maxell, Limited
where one patent can have more than one assignee
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