Earplugs

Details Earplugs Earplugs

1976-03-12

1977-12-06

Yasko, John D.

Surgery

Truss

Pad

A61F 1102

Patent

active

RE0294870

ABSTRACT:
There are disclosed earplugs composed of certain polymeric foam materials. The earplugs are of generally cylindrical shape and of somewhat larger diameter than the human ear canal. The earplugs are composed of a foamed plasticized polymeric material having a sufficiently high concentration of plasticizer to provide the earplug with a reduced rate of recovery from compression.

REFERENCES:
patent: 2262568 (1941-11-01), Wade
patent: 2538339 (1951-01-01), Thomas
patent: 2717596 (1955-09-01), Knight
patent: 2824558 (1958-02-01), Michael
patent: 3097059 (1963-07-01), Hoffman

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