Auto-darkening welding filter

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Description

FIG. 1 is a perspective view of an auto-darkening welding filter;

FIG. 2 is a front view of the auto-darkening welding filter;

FIG. 3 is a rear view of the auto-darkening welding filter;

FIG. 4 is a left side view of the auto-darkening welding filter;

FIG. 5 is a right side view of the auto-darkening welding filter;

FIG. 6 is a top view of the auto-darkening welding filter; and,

FIG. 7 is a bottom view of the auto-darkening welding filter.

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
U.S. Patent Documents
4617033 October 14, 1986 Strang
D322493 December 17, 1991 Metzger
D324588 March 10, 1992 Metzger
D349588 August 9, 1994 Howard
D353692 December 20, 1994 Fergason
D482502 November 18, 2003 Huh
D678619 March 19, 2013 Jackson
D683502 May 28, 2013 Jackson
8990963 March 31, 2015 Matthews
20040178326 September 16, 2004 Hamilton
20050057544 March 17, 2005 Hamilton
20130097760 April 25, 2013 Feinberg
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