Title:
Self-righting post
United States Patent 1425945

Inventors:
Congdon Jr., Ernest W.
Publication Date:
08/15/1922
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Assignee:
Congdon Jr., Ernest W.
Primary Class:
40/608
Other Classes:
446/396
International Classes:
E01F9/012; E01F9/016; E01F9/017; E01F9/011