30 Utility and 1 Design Patents
#4,208 in Tokyo
#19,766 in Japan
#92,263 in the World
rank by utility patentsForward Citations = 90
Company Filing History:
Hitachi Industrial Equipment Systems Co., Ltd.
Taiyo Nippon Sanso Corporation

4. 3 out of 1,229
Nhk Spring Co., Ltd.
5. 2 out of 10
Toho Kasei Co., Ltd.
where one patent can have more than one assignee
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