Gas mask

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Description

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.

Referenced Cited
U.S. Patent Documents
D181887 January 1958 Stuart
4250877 February 17, 1981 Owens et al.
4677976 July 7, 1987 Fujinuma et al.
Foreign Patent Documents
2201096 August 1988 GBX
Patent History
Patent number: D320868
Type: Grant
Filed: Nov 16, 1989
Date of Patent: Oct 15, 1991
Inventors: Akira Kumagai (Urayasu-shi, Chiba-ken), Hitoshi Kumagai (Tokyo)
Primary Examiner: Kay H. Chin
Law Firm: Fleit, Jacobson, Cohn, Price, Holman & Stern
Application Number: 7/437,499
Classifications
Current U.S. Class: D29/9; D29/7