21 Utility and 7 Design Patents
#6,826 in Tokyo
#34,109 in Japan
#157,673 in the World
rank by utility patentsForward Citations = 451
Company Filing History:
Thk Co., Ltd.
Asahi Kasei Kabushiki Kaisha
Technova Corporation
4. 1 out of 595
Sumco Corporation
5. 1 out of 5,207

where one patent can have more than one assignee
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