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The ornamental design for a screwdriver, as shown and described.
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Feb 22 2011 | TOSZEGI, ALEXANDER | Hilti Aktiengesellschaft | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 025869 | /0594 | |
Feb 28 2011 | Hilti Aktiengesellschaft | (assignment on the face of the patent) | / |
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