30 Utility and 1 Design Patents
#4,213 in Tokyo
#19,789 in Japan
#92,522 in the World
rank by utility patentsForward Citations = 57
Company Filing History:


Seiwa Giken Inc.
4. 2 out of 4,698

5. 2 out of 4,676

where one patent can have more than one assignee
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