2 trademarks were found for owners matching the name Sigma Koki Co Ltd.
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1 TM: 1518028
Desc: OPTOSIGMA
Owner: SIGMA KOKI CO., LTD.
Class: 9
Status: Protected: Registered/protected
2 TM: 1525764
Desc: OPTOSIGMA
Owner: SIGMA KOKI CO., LTD.
Class: 9
Status: Protected: Registered/protected