Respiratory protection mask

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Description

FIG. 1 is a front elevational view of a respiratory protection mask of my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a perspective view thereof shown in use; and,

FIG. 4 is a rear exploded perspective view thereof.

Referenced Cited
U.S. Patent Documents
D224277 July 1972 Venaleck
D277520 February 12, 1985 Gregory
2227667 January 1941 Panettiere
2237305 April 1941 Heimann
2362382 November 1944 Lehmberg
4520509 June 4, 1985 Ward
4579113 April 1, 1986 McCreadie et al.
4671271 June 9, 1987 Bishop et al.
4941467 July 17, 1990 Takata
Patent History
Patent number: D340317
Type: Grant
Filed: Jun 6, 1991
Date of Patent: Oct 12, 1993
Inventor: Harry Cole (London SW9 0DX)
Primary Examiner: A. Hugo Word
Assistant Examiner: Ian Simmons
Attorney: Remy J. VanOphem
Application Number: 7/711,669
Classifications
Current U.S. Class: D29/7; Pulmonary (38) (D24/164); D29/8