Title:
Safety guard
United States Patent 3372772
US Patent References:
Scaffolding ladder
- - 2069969

Ladder attachment
- - 2174891

Stepladder attachment
- - 2183191

Auxiliary ladder step assembly
- - 2876047

Safety ladder
- - 3225863


Inventors:
Murray, Singer
Publication Date:
03/12/1968
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Primary Class:
182/230
Other Classes:
182/106, 182/129
International Classes:
E04H4/06; E06C7/00; E04H4/00
US Patent References:
0463868
Foreign References:
NL15061C