Nasal air filter
United States Patent 2890695
US Patent References:
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- - 1322375


Inventors:
Safstrom, Gustaf A.
Publication Date:
06/16/1959
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Assignee:
Safstrom, Gustaf A.
Primary Class:
128/206.110
International Classes:
A62B23/06; A62B23/00
Foreign References:
GB393516A