Title:
Ear fittings
United States Patent 3415246
US Patent References:
Ear stopper
- - 2246737

Ear insert for earphones
- - 2487038

Ear protector from noise and dirt
- - 3259128

Ear protector
- - 3301253


Inventors:
Hill, George M.
Publication Date:
12/10/1968
View Patent Images:
Download PDF 3415246 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
SIGMA SALES CORP
Primary Class:
128/864
Other Classes:
181/130, 2/209, 381/380
International Classes:
A61F11/08; A61F11/00




<- Previous Patent (Noise-suppression di...)   |   Next Patent (Sequential programme...) ->