Welding helmet
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Description
In the drawings, the broken lines in
Claims
The ornamental design for a welding helmet, as shown and described.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
Other references
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Patent History
Patent number: D667173
Type: Grant
Filed: Aug 31, 2010
Date of Patent: Sep 11, 2012
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Oskar Juhlin (Gustavsberg), Martin Birath (Liding{hacek over (o)}), Björn Daniels (Vikarbyn)
Primary Examiner: Elizabeth J Oswecki
Application Number: 29/368,892
Type: Grant
Filed: Aug 31, 2010
Date of Patent: Sep 11, 2012
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Oskar Juhlin (Gustavsberg), Martin Birath (Liding{hacek over (o)}), Björn Daniels (Vikarbyn)
Primary Examiner: Elizabeth J Oswecki
Application Number: 29/368,892
Classifications
Current U.S. Class:
Element Or Attachment (D29/122)