Title:
Ear protecting device
United States Patent 2785676
US Patent References:
/0706975.html
- - 0706975

Device for protecting the ear drum
- - 2441866


Inventors:
Boris, Berkman
Publication Date:
03/19/1957
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Assignee:
Boris, Berkman
Primary Class:
128/867
International Classes:
A61F11/08; A61F11/00
Foreign References:
FR977197A