Patent
   D311789
Priority
Sep 02 1988
Filed
Sep 02 1988
Issued
Oct 30 1990
Expiry
Oct 30 2004
Assg.orig
Entity
unknown
2
6
n/a
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
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