212 Utility and 4 Design Patents
#14 in Yokohama
#189 in Japan
#1,848 in the World
rank by utility patentsForward Citations = 3,215
Company Filing History:





Nhk Spring Co., Ltd.
4. 4 out of 5,100

5. 3 out of 831,952 patents
Other
where one patent can have more than one assignee
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