Ladder hoist
United States Patent 3115211
US Patent References:
/0107225.html
- - 0107225

/0976210.html
- - 0976210

Extension ladder and elevator
- - 2249900

Fire rescue device
- - 2338833

Scaffold
- - 2396070


Inventors:
Ostrander Jr., John A.
Publication Date:
12/24/1963
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Assignee:
Ostrander Jr., John A.
Primary Class:
182/103
Other Classes:
187/241, 182/214
International Classes:
E06C7/12; E06C7/00
US Patent References:
2438791Sliding ladder jack
2459621Hoisting attachment for ladders
2592006Prop attachment for ladders
2710129Ladder supporting attachment
2720354Adjustable ladder for washing windows
2806642Ladder offset apparatus
2855072Hoist
2934162Auxiliary ladder step
2943708Hoisting equipment
3037579Ladder attachment
Foreign References:
GB161702A