Auto-darkening welding filter
Description
The broken lines in the drawings depict unclaimed environmental subject matter.
Claims
The ornamental design for an auto-darkening welding filter, as shown and described.
Referenced Cited
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Patent History
Patent number: D816746
Type: Grant
Filed: Jan 25, 2016
Date of Patent: May 1, 2018
Assignee: ANTRA TECHNOLOGIES CO., LTD. (Wuxi)
Inventor: Kailiang Liu (Wuxi)
Primary Examiner: Patricia A Palasik
Application Number: 29/552,732
Type: Grant
Filed: Jan 25, 2016
Date of Patent: May 1, 2018
Assignee: ANTRA TECHNOLOGIES CO., LTD. (Wuxi)
Inventor: Kailiang Liu (Wuxi)
Primary Examiner: Patricia A Palasik
Application Number: 29/552,732
Classifications