Title:
Bar bell having collapsible chambers
Document Type and Number:
United States Patent 3231270
Inventors:
Marvin, Winer
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Publication Date:
01/25/1966
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Referenced by:
Export Citation:
Assignee:
Marvin, Winer
Primary Class:
Other Classes:
D21/681
International Classes:
A63B21/072; A63B21/06