Rear vision face mask

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Description

FIG. 1 is a perspective view showing the top, front and sides of a face mask with a pair of extended vision optical elements in non-hyphen operable stored positions, showing my new design, the side opposite being a mirror image;

FIG. 2 is a perspective view showing the top, front and sides of the face mask with the optical elements in operable positions; and,

FIG. 3 is a perspective view showing the top, rear and sides of the face mask with the optical elements in operable positions.

Referenced Cited
U.S. Patent Documents
D220291 March 1971 Bloch
D293328 December 22, 1987 Murphy et al.
D308980 July 3, 1990 McGee
D313236 December 25, 1990 Mackay
D327079 June 16, 1992 Allen
D382890 August 26, 1997 Berke
D391040 February 24, 1998 Berke
D396484 July 28, 1998 Stables
D398325 September 15, 1998 Hall et al.
Patent History
Patent number: D421040
Type: Grant
Filed: Nov 23, 1998
Date of Patent: Feb 22, 2000
Inventor: Joseph J. Berke (West Bloomfield, MI)
Primary Examiner: Raphael Barkai
Attorney: Alex Rhodes
Application Number: 0/96,874