81 Utility and 1 Design Patents
#652 in Tokyo
#2,681 in Japan
#15,037 in the World
rank by utility patentsForward Citations = 603
Company Filing History:

Senju Metal Industry Co., Ltd.
Mitsubishi Rayon Company, Limited
4. 5 out of 832,448 patents
Other
5. 5 out of 6,613

where one patent can have more than one assignee
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