Extensible trestle
United States Patent 2947378
US Patent References:
/0947810.html
- - 0947810

/1207158.html
- - 1207158

Combined extension ladder and trestle
- - 1965311

Ladder
- - 1986477

Combined extension ladder and trestle
- - 2017563


Inventors:
Brynjolfsson, Bergur L.
Publication Date:
08/02/1960
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Assignee:
Brynjolfsson, Bergur L.
Primary Class:
182/105
Other Classes:
182/182.300, 182/227, 182/182.500, 182/182.400
International Classes:
E04G1/34; E04G1/00
US Patent References:
2144440Extension ladder trestle