87 Utility and 2 Design Patents
#186 in Yokohama
#2,182 in Japan
#12,773 in the World
rank by utility patentsForward Citations = 422
Company Filing History:



4. 12 out of 1,213
Nhk Spring Co., Ltd.
5. 6 out of 28,423

where one patent can have more than one assignee
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