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The ornamental design for an ultrasonic cutter head, as shown and described.
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The broken lines shown in
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Jan 29 2018 | QUN, CAO | BEIJING SMTP TECHNOLOGY CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 045233 | /0756 | |
Jan 31 2018 | Beijing SMTP Technology Co., Ltd. | (assignment on the face of the patent) | / |
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