Flexible check valve
United States Patent 2999499
US Patent References:
/1220872.html
- - 1220872

Valve
- - 1880948

Valve
- - 2121354

Valve stem
- - 2262169

Safety tube
- - 2343828


Inventors:
Willet, Richard H.
Publication Date:
09/12/1961
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Assignee:
Cutter, Lab
Primary Class:
604/83
Other Classes:
604/80, 239/576, 251/342, 137/539, 604/251
International Classes:
A61M5/14; A61M39/24; A61M39/00
US Patent References:
2797703Plastic grease fitting
2866457Apparatus for administration of parenteral fluids
Foreign References:
DE602142C