Chinese authority 8282570, 8282577, 8282857 AutoChief C20 propulsion control system DataChief C20 marine automation system K-Chief 500 marine automation system K-Chief 600 marine automation system Issued by Chinese authority Certificate type Trademark certificate Certificate no NO 8282570, NO 8282577, NO 8282857 Expiration date 13.05.2021 Document file scan copy of Trademark Certificate.pdf Related file(s) tm certificate NO 8282570.pdf tm certificate NO 8282577.pdf tm certificate NO 8282857.pdf