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The ornamental design for a welding helmet, as shown.
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Patent | Priority | Assignee | Title |
8826464, | Sep 29 2011 | TECMEN ELECTRONICS CO , LTD | Filter holding system for welding mask |
D652577, | Dec 03 2010 | Seeko International Ltd. | Welding helmet |
D654226, | Jul 22 2011 | TECMEN ELECTRONICS CO , LTD | Welding helmet |
D654634, | Jul 22 2011 | TECMEN ELECTRONICS CO , LTD | Welding helmet |
D734558, | Dec 16 2013 | TECMEN ELECTRONICS CO , LTD | Welding helmet |
D769543, | May 12 2015 | Illinois Tool Works Inc | Protective helmet |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Apr 14 2016 | YANG, ZHAOLIN | NINGBO GEOSTAR PHOTOELECTRIC TECHNOLOGY CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 042681 | /0063 |
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