Title:
Extension ladder jack
United States Patent 2779561
Inventors:
Blundeau, James H.
Publication Date:
01/29/1957
Export Citation:
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Assignee:
Blundeau, James H.
Primary Class:
248/238
Other Classes:
182/117, 403/108
International Classes:
E06C7/16; E06C7/00
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US Patent References:
2578119Scaffolding device
2577286Adjustable ladder jack and scaffold
2548380Ladder jack
2488984Ladder bracket
2488480Telescopic antenna
2229475Telescoping member
1576695Ladder-bracing attachment
1452182Platform ladder jack
0791531N/A
Foreign References:
FR798851A