3797478 is referenced by 158 patents and cites 6 patents.

A valve adapted to be positioned in the channel of the urethra for the maintenance of such channel at a predetermined size in a substantially sterilized condition relative to bacteria, such valve controlling the flow of urine from the bladder through the channel of the urethra to the atmosphere.

Title
Multi-functional valve for use in the urethra
Application Number
05/270,866
Publication Number
3797478
Application Date
July 11, 1972
Publication Date
March 19, 1974
Inventor
Costigan Edward F
Walsh Michael Adrian
Agent
Costigan Edward F
IPC
A61m 25/00
A61b 19/00
A61M 25/10
A61F 02/00
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