Title:
Crowned cupped resilient plug for cylindrical passages
United States Patent 2577780

Inventors:
Lockhart, Marshall L.
Publication Date:
12/11/1951
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Assignee:
COMPULE CORP
Primary Class:
604/415
Other Classes:
215/247, 215/355
International Classes:
A61M5/315; B60G9/00; B60G11/22; B65D25/08; B60G11/00; B65D25/04
Other References:
None