Title:
Flexible valve
United States Patent 2568976
US Patent References:
Valve for playing balls
- - 1641382
Flutter valve
- - 1680757
Collapsible valve and method of making same
- - 1702974
Valve bag closure
- - 1809259
Valve for playing balls
- - 1641382
Flutter valve
- - 1680757
Collapsible valve and method of making same
- - 1702974
Valve bag closure
- - 1809259
Inventors:
Andrews, Alvadore M.
Publication Date:
09/25/1951
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Export Citation:
Assignee:
Andrews, Alvadore M.
Primary Class:
Other Classes:
383/58, 137/851
International Classes:
F16K15/20; F16K15/00
Foreign References:
| GB337958A |