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Expired
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Matthew Coon
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Individual
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Individual
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Publication of GB191313937ApublicationCriticalpatent/GB191313937A/en
A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B23/00—Filters for breathing-protection purposes
A62B23/06—Nose filters
Abstract
13,937. Coon, M. June 16. Respirators.-A nasal respirator comprises a spring clamp 6 for the septum, and gold or other elliptical rims 3, which are bent over to clamp linen or metal meshwork screens 4. The screens may be arranged in front of or within the nostrils.