49 Utility and 3 Design Patents
#1,763 in Tokyo
#7,926 in Japan
#39,366 in the World
rank by utility patentsForward Citations = 559
Company Filing History:


Optec D.d. Melco Laboratory Co., Ltd.
4. 4 out of 4
Optec Dai-ichi Denko Co., Ltd.
5. 3 out of 5,637

where one patent can have more than one assignee
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