Visor attachment for safety helmets

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Description

FIG. 1 is a side elevational view of a visor attachment for safety helmets showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D168736 February 1953 Cooper et al.
2798222 July 1957 Evans et al.
3369255 February 1968 Bolle
4117553 October 3, 1978 Bay
4856109 August 15, 1989 Desy et al.
Patent History
Patent number: D319899
Type: Grant
Filed: May 30, 1989
Date of Patent: Sep 10, 1991
Assignee: Institut de Recherche en Sante et an Securite du Travail du Quebec (Montreal)
Inventor: Martin Pernicka (Montreal)
Primary Examiner: A. Hugo Word
Assistant Examiner: Paula Allen
Attorney: Jean H. Dubuc
Application Number: 7/363,942
Classifications
Current U.S. Class: D29/16