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The ornamental design for a drilling tool, as shown and described.
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The broken lines shown in the drawings represent portions of the drilling tool that form no part of the claimed design.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Aug 20 2014 | YANO, KAZUYA | SUMITOMO ELECTRIC HARDMETAL CORP | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 038340 | /0862 | |
Apr 21 2016 | SUMITOMO ELECTRIC HARDMETAL CORP. | (assignment on the face of the patent) | / |
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