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The design for a welding mask, as shown and described. |
FIG. 1 is a perspective view of a welding mask showing my new design
FIG. 2 is a front elevational view;
FIG. 3 is a rear elevational view;
FIG. 4 is a left side elevational view;
FIG. 5 is a right side elevational view;
FIG. 6 is a top plan view; and,
FIG. 7 is a bottom plan view.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Sep 09 1999 | HUH, MOON YOUNG | OTOS OPTICAL CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 010271 | /0820 | |
Sep 24 1999 | Otos Optical Co., Ltd. | (assignment on the face of the patent) | / | |||
Oct 13 2008 | OTOS OPTICAL CO , LTD | OTOS TECH CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 021731 | /0238 |
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