Welding filter
Claims
The ornamental design for a welding filter, as shown and described.
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Type: Grant
Filed: Apr 20, 2018
Date of Patent: Sep 14, 2021
Assignee: Ningbo Geostar Photoelectric Technology Co., Ltd. (Ningbo)
Inventors: Zhaolin Yang (Zhejiang), Jianrong Zhou (Zhejiang), Rongjiang Wang (Zhejiang)
Primary Examiner: Michael C Stout
Assistant Examiner: Fritzgerald L Butac
Application Number: 29/644,743