7 Utility Patents
#6,492 in Yokohama
#119,543 in Japan
#576,745 in the World
Forward Citations = 71
Company Filing History:
Nhk Spring Co., Ltd.

where one patent can have more than one assignee
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#6,492 in Yokohama
#119,543 in Japan
#576,745 in the World
Company Filing History:

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