Gas delivery mask

- Lifeline Limited
Description

FIG. 1 is a top, front and left side perspective view of a gas delivery mask showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D168311 December 1952 Lewis
D250131 October 31, 1978 Lewis et al.
D262322 December 15, 1981 Mizerak
D294410 February 23, 1988 Montesi
4723542 February 9, 1988 Giffard
Patent History
Patent number: D310431
Type: Grant
Filed: Jul 24, 1987
Date of Patent: Sep 4, 1990
Assignee: Lifeline Limited (Vale)
Inventor: Howard G. Bellm (The Priory)
Primary Examiner: A. Hugo Word
Assistant Examiner: Ruth McInroy
Law Firm: Fliesler, Dubb Meyer & Lovejoy
Application Number: 7/77,180
Classifications
Current U.S. Class: D29/8