Breathing mask
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Description
FIG. 1 is a perspective view of a breathing mask showing our new design;
FIG. 2 is a left side elevation thereof;
FIG. 3 is a rear perspective view thereof,
FIG. 4 is a bottom perspective view thereof; and
FIG. 5 is a right side elevation of a modified embodiment of the mask illustrated in FIG. 1.
The broken lines representing the human form is shown for illustrative purposes only.
Referenced Cited
U.S. Patent Documents
D197450 | February 1964 | Grimm |
D197451 | February 1964 | Grimm |
D209884 | January 1968 | Hansford, Jr. |
D225582 | December 1972 | King |
2540567 | February 1951 | Bennett |
2843121 | July 1958 | Hudson |
3802431 | April 1974 | Farr |
Patent History
Patent number: D250131
Type: Grant
Filed: Oct 18, 1976
Date of Patent: Oct 31, 1978
Assignee: Chemetron Corporation (Chicago, IL)
Inventors: George T. Lewis (Fallbrook, CA), John H. Price (La Jolla, CA)
Primary Examiner: Bernard Ansher
Attorney: Nicholas M. Esser
Application Number: 5/733,571
Type: Grant
Filed: Oct 18, 1976
Date of Patent: Oct 31, 1978
Assignee: Chemetron Corporation (Chicago, IL)
Inventors: George T. Lewis (Fallbrook, CA), John H. Price (La Jolla, CA)
Primary Examiner: Bernard Ansher
Attorney: Nicholas M. Esser
Application Number: 5/733,571
Classifications