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The ornamental design for a gas mask, as shown and described. |
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FIG. 1 is a front elevational view of a gas mask showing our new design;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational veiw thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a cross sectional view thereof; and
FIG. 8 is a top and front perspective view thereof.
Kumagai, Hitoshi, Kumagai, Akira
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| Patent | Priority | Assignee | Title |
| 4250877, | May 15 1978 | MORSE DIVING EQUIPMENT COMPANY, INC , A CORP OF MA | Diver's helmet and face mask for use therewith |
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| GB2201096, |
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