Extension ladder jack
United States Patent 2779561
US Patent References:
/0791531.html
- - 0791531

Platform ladder jack
- - 1452182

Ladder-bracing attachment
- - 1576695

Telescoping member
- - 2229475

Telescopic antenna
- - 2488480


Inventors:
Blundeau, James H.
Publication Date:
01/29/1957
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Assignee:
Blundeau, James H.
Primary Class:
248/238
Other Classes:
182/117, 403/108
International Classes:
E06C7/16; E06C7/00
US Patent References:
2488984Ladder bracket
2548380Ladder jack
2577286Adjustable ladder jack and scaffold
2578119Scaffolding device
Foreign References:
FR798851A