04159719 is referenced by 95 patents and cites 7 patents.

A tightly coiled, substantially cylindrical wick of compressed, dehydrated, sponge-like material having sufficient rigidity to be inserted endwise into an ear canal will, when hydrated, uncoil and expand radially whereby to substantially engage the inner surface of the ear canal for applying medicament to said inner surface while securing it against accidental or unintentional dislodgment therefrom. When hydrated, a central opening is provided through the uncoiled member through which opening sound waves may freely pass en route to the ear drum.

Title
Moisture-expandable ear wick
Application Number
5/794917
Publication Number
4159719
Application Date
May 9, 1977
Publication Date
July 3, 1979
Inventor
Raymond H Haerr
Cincinnati
OH, US
Agent
John G Schenk
Assignee
Xomed
OH, US
IPC
A61M 31/00
A61F 1/18
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