Title:
Mask for protecting respiratory tract
United States Patent 3249108


Inventors:
Terman, Louis A.
Application Number:
US33088963A
Publication Date:
05/03/1966
Filing Date:
12/16/1963
Assignee:
Terman, Louis A.
Primary Class:
Other Classes:
128/206.24, 219/211, 219/527, 219/529, D24/110.4
International Classes:
A41D13/11; A61F7/02; A62B7/10; A61F7/00
View Patent Images:
US Patent References:
2922418Air-permeable product and method of making the same1960-01-26
2410903Heated nasal inhaler1946-11-12
1633705Breathing and vocal attachment1927-06-28
1292096N/A1919-01-21
Foreign References:
FR1257220A1961-03-31
FR1268021A1961-07-28
DE627215C1936-08-17