Head seal for an anti-dust helmet

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Description

FIG. 1 is a perspective view of a head seal for an anti-dust helmet showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front elevational view thereof; and

FIG. 4 is a top plan view thereof.

Referenced Cited
U.S. Patent Documents
2641768 June 1953 Pipher
3241155 March 1966 Phillips
3774239 November 1973 Kotzar
Patent History
Patent number: D250496
Type: Grant
Filed: Jan 7, 1977
Date of Patent: Dec 12, 1978
Inventors: Raymond Odell (Potters Bar, Herts.), Brian A. Lowe (Cheshunt, Herts.)
Primary Examiner: Melvin B. Feifer
Attorney: Lawrence E. Laubscher
Application Number: 5/757,562
Classifications
Current U.S. Class: D/2233
International Classification: D0203;