63 Utility and 3 Design Patents
#1,158 in Tokyo
#4,831 in Japan
#24,836 in the World
rank by utility patentsForward Citations = 272
Company Filing History:


Shigematsu Works Co., Ltd.
4. 6 out of 8
Welco Co., Ltd
5. 5 out of 15,823

where one patent can have more than one assignee
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