Medical face mask

Details Medical face mask Medical face mask

1980-04-21

1982-04-06

Yasko, John D.

Surgery

Truss

Pad

12820612, A61B 1900

Patent

active

043230636

ABSTRACT:
A medical face mask having the central portion of the mask made of a transparent material, providing a view of the wearer's mouth.

REFERENCES:
patent: 1925764 (1933-09-01), Le Duc
patent: 3288138 (1966-11-01), Sachs
patent: 3438370 (1969-04-01), Krantz, Jr.
patent: 3500825 (1970-03-01), Andersson et al.
patent: 3664335 (1972-05-01), Boucher et al.
patent: 3736928 (1973-06-01), Andersson et al.

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