|
The ornamental design for a protective mask, as shown and described. |
FIG. 1 is a front elevational view of a protective mask showing our new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
Villarreal, Richard, Villarreal, Yvonne A.
Patent | Priority | Assignee | Title |
D319111, | Aug 28 1989 | ALPHA PRO TECH, INC | Combined face mask and shield |
D858749, | Aug 06 2016 | Mouth-held filter |
Patent | Priority | Assignee | Title |
2164330, | |||
2620794, | |||
2888920, | |||
3180333, | |||
4440163, | Jul 30 1982 | Emergency escape breathing apparatus | |
4756308, | Oct 25 1984 | AKG Akustische u.Kino-Gerate Gesellschaft m.b.H. | Protective breathing mask having a speaking diaphragm for close communication and an electroacoustic transducer system for indirect speech transmission from inside the mask |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Date | Maintenance Fee Events |
Date | Maintenance Schedule |