Flip-up auto darkening welding helmet
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The broken lines shown in the drawings represent portions of the flip-up auto darkening welding helmet that form no part of the claimed design.
Claims
The ornamental design for a flip-up auto darkening welding helmet, as shown and described.
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Type: Grant
Filed: Mar 10, 2017
Date of Patent: Oct 2, 2018
Assignee: Tecmen Electronics Co., Ltd. (Nanjing)
Inventor: Ziqian Wu (Nanjing)
Primary Examiner: Robert A Delehanty
Application Number: 29/596,797