Protective mask

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Description

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.

Referenced Cited
U.S. Patent Documents
2164330 July 1939 Katz et al.
2620794 December 1952 George
2888920 June 1959 Mollering et al.
3180333 April 1965 Lewis
4440163 April 3, 1984 Spergel
4756308 July 12, 1988 Ryback
Patent History
Patent number: D311789
Type: Grant
Filed: Sep 2, 1988
Date of Patent: Oct 30, 1990
Inventors: Richard Villarreal (Milwaukee, WI), Yvonne A. Villarreal (Milwaukee, WI)
Primary Examiner: Kay H. Chin
Attorney: Jerry T. Kearns
Application Number: 7/240,042
Classifications
Current U.S. Class: D29/9; D29/6