82 Utility and 1 Design Patents
#642 in Tokyo
#2,617 in Japan
#14,822 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 832,812 patents
Other
5. 5 out of 6,656

where one patent can have more than one assignee
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