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The ornamental design for welding helmet, as shown. |
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FIG. 1 is a front perspective view of a welding helmet of my new design;
FIG. 2 is a rear perspective view of the welding helmet of FIG. 1;
FIG. 3 is a left (as viewed in FIG. 1) side elevational view;
FIG. 4 is a right (as viewed in FIG. 1) side elevational view;
FIG. 5 is a front elevational view of the welding helmet of FIG. 1;
FIG. 6 is a rear elevational view of the welding helmet of FIG. 1;
FIG. 7 is a top plan view of the welding helmet of FIG. 1;
FIG. 8 is a bottom plan view of the welding helmet of FIG. 1;
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Mar 18 1993 | Optrel AG | (assignment on the face of the patent) | / |
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